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-rw-r--r--drivers/char/bsr.c2
-rw-r--r--drivers/char/dsp56k.c2
-rw-r--r--drivers/char/hangcheck-timer.c33
-rw-r--r--drivers/char/hw_random/core.c67
-rw-r--r--drivers/char/i8k.c123
-rw-r--r--drivers/char/pcmcia/synclink_cs.c4
-rw-r--r--drivers/char/random.c315
-rw-r--r--drivers/char/tpm/tpm-interface.c73
-rw-r--r--drivers/char/tpm/tpm_eventlog.c4
-rw-r--r--drivers/char/tpm/tpm_i2c_stm_st33.c1
-rw-r--r--drivers/char/tpm/tpm_tis.c31
-rw-r--r--drivers/char/xilinx_hwicap/xilinx_hwicap.c1
12 files changed, 424 insertions, 232 deletions
diff --git a/drivers/char/bsr.c b/drivers/char/bsr.c
index 8fedbc250414..a6cef548e01e 100644
--- a/drivers/char/bsr.c
+++ b/drivers/char/bsr.c
@@ -259,7 +259,7 @@ static int bsr_add_node(struct device_node *bn)
}
cur->bsr_device = device_create(bsr_class, NULL, cur->bsr_dev,
- cur, cur->bsr_name);
+ cur, "%s", cur->bsr_name);
if (IS_ERR(cur->bsr_device)) {
printk(KERN_ERR "device_create failed for %s\n",
cur->bsr_name);
diff --git a/drivers/char/dsp56k.c b/drivers/char/dsp56k.c
index 01a5ca7425d7..8bf70e8c3f79 100644
--- a/drivers/char/dsp56k.c
+++ b/drivers/char/dsp56k.c
@@ -383,7 +383,7 @@ static long dsp56k_ioctl(struct file *file, unsigned int cmd,
return put_user(status, &hf->status);
}
case DSP56K_HOST_CMD:
- if (arg > 31 || arg < 0)
+ if (arg > 31)
return -EINVAL;
mutex_lock(&dsp56k_mutex);
dsp56k_host_interface.cvr = (u_char)((arg & DSP56K_CVR_HV_MASK) |
diff --git a/drivers/char/hangcheck-timer.c b/drivers/char/hangcheck-timer.c
index f953c96efc86..ebc4c73d8ca4 100644
--- a/drivers/char/hangcheck-timer.c
+++ b/drivers/char/hangcheck-timer.c
@@ -49,7 +49,7 @@
#include <asm/uaccess.h>
#include <linux/sysrq.h>
#include <linux/timer.h>
-#include <linux/time.h>
+#include <linux/hrtimer.h>
#define VERSION_STR "0.9.1"
@@ -117,24 +117,7 @@ __setup("hcheck_reboot", hangcheck_parse_reboot);
__setup("hcheck_dump_tasks", hangcheck_parse_dump_tasks);
#endif /* not MODULE */
-#if defined(CONFIG_S390)
-# define HAVE_MONOTONIC
-# define TIMER_FREQ 1000000000ULL
-#else
-# define TIMER_FREQ 1000000000ULL
-#endif
-
-#ifdef HAVE_MONOTONIC
-extern unsigned long long monotonic_clock(void);
-#else
-static inline unsigned long long monotonic_clock(void)
-{
- struct timespec ts;
- getrawmonotonic(&ts);
- return timespec_to_ns(&ts);
-}
-#endif /* HAVE_MONOTONIC */
-
+#define TIMER_FREQ 1000000000ULL
/* Last time scheduled */
static unsigned long long hangcheck_tsc, hangcheck_tsc_margin;
@@ -143,12 +126,11 @@ static void hangcheck_fire(unsigned long);
static DEFINE_TIMER(hangcheck_ticktock, hangcheck_fire, 0, 0);
-
static void hangcheck_fire(unsigned long data)
{
unsigned long long cur_tsc, tsc_diff;
- cur_tsc = monotonic_clock();
+ cur_tsc = ktime_get_ns();
if (cur_tsc > hangcheck_tsc)
tsc_diff = cur_tsc - hangcheck_tsc;
@@ -177,7 +159,7 @@ static void hangcheck_fire(unsigned long data)
tsc_diff, tsc_diff - hangcheck_tick*TIMER_FREQ);
#endif
mod_timer(&hangcheck_ticktock, jiffies + (hangcheck_tick*HZ));
- hangcheck_tsc = monotonic_clock();
+ hangcheck_tsc = ktime_get_ns();
}
@@ -185,16 +167,11 @@ static int __init hangcheck_init(void)
{
printk("Hangcheck: starting hangcheck timer %s (tick is %d seconds, margin is %d seconds).\n",
VERSION_STR, hangcheck_tick, hangcheck_margin);
-#if defined (HAVE_MONOTONIC)
- printk("Hangcheck: Using monotonic_clock().\n");
-#else
- printk("Hangcheck: Using getrawmonotonic().\n");
-#endif /* HAVE_MONOTONIC */
hangcheck_tsc_margin =
(unsigned long long)(hangcheck_margin + hangcheck_tick);
hangcheck_tsc_margin *= (unsigned long long)TIMER_FREQ;
- hangcheck_tsc = monotonic_clock();
+ hangcheck_tsc = ktime_get_ns();
mod_timer(&hangcheck_ticktock, jiffies + (hangcheck_tick*HZ));
return 0;
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index c4419ea1ab07..6e02ec103cc7 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -38,6 +38,7 @@
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/miscdevice.h>
+#include <linux/kthread.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/random.h>
@@ -50,10 +51,22 @@
static struct hwrng *current_rng;
+static struct task_struct *hwrng_fill;
static LIST_HEAD(rng_list);
static DEFINE_MUTEX(rng_mutex);
static int data_avail;
-static u8 *rng_buffer;
+static u8 *rng_buffer, *rng_fillbuf;
+static unsigned short current_quality;
+static unsigned short default_quality; /* = 0; default to "off" */
+
+module_param(current_quality, ushort, 0644);
+MODULE_PARM_DESC(current_quality,
+ "current hwrng entropy estimation per mill");
+module_param(default_quality, ushort, 0644);
+MODULE_PARM_DESC(default_quality,
+ "default entropy content of hwrng per mill");
+
+static void start_khwrngd(void);
static inline int rng_get_data(struct hwrng *rng, u8 *buffer, size_t size,
int wait);
@@ -89,6 +102,15 @@ static inline int hwrng_init(struct hwrng *rng)
return ret;
}
add_early_randomness(rng);
+
+ current_quality = rng->quality ? : default_quality;
+ current_quality &= 1023;
+
+ if (current_quality == 0 && hwrng_fill)
+ kthread_stop(hwrng_fill);
+ if (current_quality > 0 && !hwrng_fill)
+ start_khwrngd();
+
return 0;
}
@@ -325,6 +347,36 @@ err_misc_dereg:
goto out;
}
+static int hwrng_fillfn(void *unused)
+{
+ long rc;
+
+ while (!kthread_should_stop()) {
+ if (!current_rng)
+ break;
+ rc = rng_get_data(current_rng, rng_fillbuf,
+ rng_buffer_size(), 1);
+ if (rc <= 0) {
+ pr_warn("hwrng: no data available\n");
+ msleep_interruptible(10000);
+ continue;
+ }
+ add_hwgenerator_randomness((void *)rng_fillbuf, rc,
+ rc * current_quality * 8 >> 10);
+ }
+ hwrng_fill = NULL;
+ return 0;
+}
+
+static void start_khwrngd(void)
+{
+ hwrng_fill = kthread_run(hwrng_fillfn, NULL, "hwrng");
+ if (hwrng_fill == ERR_PTR(-ENOMEM)) {
+ pr_err("hwrng_fill thread creation failed");
+ hwrng_fill = NULL;
+ }
+}
+
int hwrng_register(struct hwrng *rng)
{
int err = -EINVAL;
@@ -343,6 +395,13 @@ int hwrng_register(struct hwrng *rng)
if (!rng_buffer)
goto out_unlock;
}
+ if (!rng_fillbuf) {
+ rng_fillbuf = kmalloc(rng_buffer_size(), GFP_KERNEL);
+ if (!rng_fillbuf) {
+ kfree(rng_buffer);
+ goto out_unlock;
+ }
+ }
/* Must not register two RNGs with the same name. */
err = -EEXIST;
@@ -406,8 +465,11 @@ void hwrng_unregister(struct hwrng *rng)
current_rng = NULL;
}
}
- if (list_empty(&rng_list))
+ if (list_empty(&rng_list)) {
unregister_miscdev();
+ if (hwrng_fill)
+ kthread_stop(hwrng_fill);
+ }
mutex_unlock(&rng_mutex);
}
@@ -418,6 +480,7 @@ static void __exit hwrng_exit(void)
mutex_lock(&rng_mutex);
BUG_ON(current_rng);
kfree(rng_buffer);
+ kfree(rng_fillbuf);
mutex_unlock(&rng_mutex);
}
diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index 93dcad0c1cbe..65525c7e903c 100644
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -65,6 +65,8 @@ static char bios_version[4];
static struct device *i8k_hwmon_dev;
static u32 i8k_hwmon_flags;
static int i8k_fan_mult;
+static int i8k_pwm_mult;
+static int i8k_fan_max = I8K_FAN_HIGH;
#define I8K_HWMON_HAVE_TEMP1 (1 << 0)
#define I8K_HWMON_HAVE_TEMP2 (1 << 1)
@@ -97,6 +99,10 @@ static int fan_mult = I8K_FAN_MULT;
module_param(fan_mult, int, 0);
MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with");
+static int fan_max = I8K_FAN_HIGH;
+module_param(fan_max, int, 0);
+MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed");
+
static int i8k_open_fs(struct inode *inode, struct file *file);
static long i8k_ioctl(struct file *, unsigned int, unsigned long);
@@ -276,7 +282,7 @@ static int i8k_set_fan(int fan, int speed)
{
struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, };
- speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed);
+ speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed);
regs.ebx = (fan & 0xff) | (speed << 8);
return i8k_smm(&regs) ? : i8k_get_fan_status(fan);
@@ -521,7 +527,7 @@ static ssize_t i8k_hwmon_show_pwm(struct device *dev,
status = i8k_get_fan_status(index);
if (status < 0)
return -EIO;
- return sprintf(buf, "%d\n", clamp_val(status * 128, 0, 255));
+ return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255));
}
static ssize_t i8k_hwmon_set_pwm(struct device *dev,
@@ -535,7 +541,7 @@ static ssize_t i8k_hwmon_set_pwm(struct device *dev,
err = kstrtoul(buf, 10, &val);
if (err)
return err;
- val = clamp_val(DIV_ROUND_CLOSEST(val, 128), 0, 2);
+ val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max);
mutex_lock(&i8k_mutex);
err = i8k_set_fan(index, val);
@@ -544,20 +550,6 @@ static ssize_t i8k_hwmon_set_pwm(struct device *dev,
return err < 0 ? -EIO : count;
}
-static ssize_t i8k_hwmon_show_label(struct device *dev,
- struct device_attribute *devattr,
- char *buf)
-{
- static const char *labels[3] = {
- "CPU",
- "Left Fan",
- "Right Fan",
- };
- int index = to_sensor_dev_attr(devattr)->index;
-
- return sprintf(buf, "%s\n", labels[index]);
-}
-
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2);
@@ -570,41 +562,34 @@ static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL,
I8K_FAN_RIGHT);
static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm,
i8k_hwmon_set_pwm, I8K_FAN_RIGHT);
-static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 0);
-static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 1);
-static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_label, NULL, 2);
static struct attribute *i8k_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */
- &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */
- &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */
- &sensor_dev_attr_temp3_input.dev_attr.attr, /* 3 */
- &sensor_dev_attr_temp4_input.dev_attr.attr, /* 4 */
- &sensor_dev_attr_fan1_input.dev_attr.attr, /* 5 */
- &sensor_dev_attr_pwm1.dev_attr.attr, /* 6 */
- &sensor_dev_attr_fan1_label.dev_attr.attr, /* 7 */
- &sensor_dev_attr_fan2_input.dev_attr.attr, /* 8 */
- &sensor_dev_attr_pwm2.dev_attr.attr, /* 9 */
- &sensor_dev_attr_fan2_label.dev_attr.attr, /* 10 */
+ &sensor_dev_attr_temp2_input.dev_attr.attr, /* 1 */
+ &sensor_dev_attr_temp3_input.dev_attr.attr, /* 2 */
+ &sensor_dev_attr_temp4_input.dev_attr.attr, /* 3 */
+ &sensor_dev_attr_fan1_input.dev_attr.attr, /* 4 */
+ &sensor_dev_attr_pwm1.dev_attr.attr, /* 5 */
+ &sensor_dev_attr_fan2_input.dev_attr.attr, /* 6 */
+ &sensor_dev_attr_pwm2.dev_attr.attr, /* 7 */
NULL
};
static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr,
int index)
{
- if ((index == 0 || index == 1) &&
- !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1))
+ if (index == 0 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1))
return 0;
- if (index == 2 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2))
+ if (index == 1 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2))
return 0;
- if (index == 3 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3))
+ if (index == 2 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3))
return 0;
- if (index == 4 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4))
+ if (index == 3 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4))
return 0;
- if (index >= 5 && index <= 7 &&
+ if (index >= 4 && index <= 5 &&
!(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1))
return 0;
- if (index >= 8 && index <= 10 &&
+ if (index >= 6 && index <= 7 &&
!(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2))
return 0;
@@ -659,6 +644,37 @@ static int __init i8k_init_hwmon(void)
return 0;
}
+struct i8k_config_data {
+ int fan_mult;
+ int fan_max;
+};
+
+enum i8k_configs {
+ DELL_LATITUDE_D520,
+ DELL_PRECISION_490,
+ DELL_STUDIO,
+ DELL_XPS_M140,
+};
+
+static const struct i8k_config_data i8k_config_data[] = {
+ [DELL_LATITUDE_D520] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_TURBO,
+ },
+ [DELL_PRECISION_490] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_TURBO,
+ },
+ [DELL_STUDIO] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_HIGH,
+ },
+ [DELL_XPS_M140] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_HIGH,
+ },
+};
+
static struct dmi_system_id i8k_dmi_table[] __initdata = {
{
.ident = "Dell Inspiron",
@@ -682,6 +698,14 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
},
},
{
+ .ident = "Dell Latitude D520",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"),
+ },
+ .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520],
+ },
+ {
.ident = "Dell Latitude 2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
@@ -703,6 +727,15 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
},
},
{
+ .ident = "Dell Precision 490",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME,
+ "Precision WorkStation 490"),
+ },
+ .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490],
+ },
+ {
.ident = "Dell Precision",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
@@ -729,7 +762,7 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Studio"),
},
- .driver_data = (void *)1, /* fan multiplier override */
+ .driver_data = (void *)&i8k_config_data[DELL_STUDIO],
},
{
.ident = "Dell XPS M140",
@@ -737,7 +770,7 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"),
},
- .driver_data = (void *)1, /* fan multiplier override */
+ .driver_data = (void *)&i8k_config_data[DELL_XPS_M140],
},
{ }
};
@@ -777,9 +810,17 @@ static int __init i8k_probe(void)
}
i8k_fan_mult = fan_mult;
+ i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */
id = dmi_first_match(i8k_dmi_table);
- if (id && fan_mult == I8K_FAN_MULT && id->driver_data)
- i8k_fan_mult = (unsigned long)id->driver_data;
+ if (id && id->driver_data) {
+ const struct i8k_config_data *conf = id->driver_data;
+
+ if (fan_mult == I8K_FAN_MULT && conf->fan_mult)
+ i8k_fan_mult = conf->fan_mult;
+ if (fan_max == I8K_FAN_HIGH && conf->fan_max)
+ i8k_fan_max = conf->fan_max;
+ }
+ i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max);
return 0;
}
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 8320abd1ef14..0ea9986059af 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -2347,8 +2347,6 @@ static void mgslpc_close(struct tty_struct *tty, struct file * filp)
printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
__FILE__, __LINE__, info->device_name, port->count);
- WARN_ON(!port->count);
-
if (tty_port_close_start(port, tty, filp) == 0)
goto cleanup;
@@ -2510,7 +2508,7 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
__FILE__, __LINE__, tty->driver->name, port->count);
/* If port is closing, signal caller to try again */
- if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING){
+ if (port->flags & ASYNC_CLOSING){
wait_event_interruptible_tty(tty, port->close_wait,
!(port->flags & ASYNC_CLOSING));
retval = ((port->flags & ASYNC_HUP_NOTIFY) ?
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 71529e196b84..c18d41db83d8 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -250,6 +250,7 @@
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <linux/spinlock.h>
+#include <linux/kthread.h>
#include <linux/percpu.h>
#include <linux/cryptohash.h>
#include <linux/fips.h>
@@ -257,6 +258,8 @@
#include <linux/kmemcheck.h>
#include <linux/workqueue.h>
#include <linux/irq.h>
+#include <linux/syscalls.h>
+#include <linux/completion.h>
#include <asm/processor.h>
#include <asm/uaccess.h>
@@ -267,6 +270,8 @@
#define CREATE_TRACE_POINTS
#include <trace/events/random.h>
+/* #define ADD_INTERRUPT_BENCH */
+
/*
* Configuration information
*/
@@ -401,6 +406,7 @@ static struct poolinfo {
*/
static DECLARE_WAIT_QUEUE_HEAD(random_read_wait);
static DECLARE_WAIT_QUEUE_HEAD(random_write_wait);
+static DECLARE_WAIT_QUEUE_HEAD(urandom_init_wait);
static struct fasync_struct *fasync;
/**********************************************************************
@@ -481,9 +487,9 @@ static __u32 const twist_table[8] = {
* the entropy is concentrated in the low-order bits.
*/
static void _mix_pool_bytes(struct entropy_store *r, const void *in,
- int nbytes, __u8 out[64])
+ int nbytes)
{
- unsigned long i, j, tap1, tap2, tap3, tap4, tap5;
+ unsigned long i, tap1, tap2, tap3, tap4, tap5;
int input_rotate;
int wordmask = r->poolinfo->poolwords - 1;
const char *bytes = in;
@@ -495,9 +501,8 @@ static void _mix_pool_bytes(struct entropy_store *r, const void *in,
tap4 = r->poolinfo->tap4;
tap5 = r->poolinfo->tap5;
- smp_rmb();
- input_rotate = ACCESS_ONCE(r->input_rotate);
- i = ACCESS_ONCE(r->add_ptr);
+ input_rotate = r->input_rotate;
+ i = r->add_ptr;
/* mix one byte at a time to simplify size handling and churn faster */
while (nbytes--) {
@@ -524,39 +529,33 @@ static void _mix_pool_bytes(struct entropy_store *r, const void *in,
input_rotate = (input_rotate + (i ? 7 : 14)) & 31;
}
- ACCESS_ONCE(r->input_rotate) = input_rotate;
- ACCESS_ONCE(r->add_ptr) = i;
- smp_wmb();
-
- if (out)
- for (j = 0; j < 16; j++)
- ((__u32 *)out)[j] = r->pool[(i - j) & wordmask];
+ r->input_rotate = input_rotate;
+ r->add_ptr = i;
}
static void __mix_pool_bytes(struct entropy_store *r, const void *in,
- int nbytes, __u8 out[64])
+ int nbytes)
{
trace_mix_pool_bytes_nolock(r->name, nbytes, _RET_IP_);
- _mix_pool_bytes(r, in, nbytes, out);
+ _mix_pool_bytes(r, in, nbytes);
}
static void mix_pool_bytes(struct entropy_store *r, const void *in,
- int nbytes, __u8 out[64])
+ int nbytes)
{
unsigned long flags;
trace_mix_pool_bytes(r->name, nbytes, _RET_IP_);
spin_lock_irqsave(&r->lock, flags);
- _mix_pool_bytes(r, in, nbytes, out);
+ _mix_pool_bytes(r, in, nbytes);
spin_unlock_irqrestore(&r->lock, flags);
}
struct fast_pool {
__u32 pool[4];
unsigned long last;
- unsigned short count;
- unsigned char rotate;
- unsigned char last_timer_intr;
+ unsigned short reg_idx;
+ unsigned char count;
};
/*
@@ -564,25 +563,29 @@ struct fast_pool {
* collector. It's hardcoded for an 128 bit pool and assumes that any
* locks that might be needed are taken by the caller.
*/
-static void fast_mix(struct fast_pool *f, __u32 input[4])
+static void fast_mix(struct fast_pool *f)
{
- __u32 w;
- unsigned input_rotate = f->rotate;
-
- w = rol32(input[0], input_rotate) ^ f->pool[0] ^ f->pool[3];
- f->pool[0] = (w >> 3) ^ twist_table[w & 7];
- input_rotate = (input_rotate + 14) & 31;
- w = rol32(input[1], input_rotate) ^ f->pool[1] ^ f->pool[0];
- f->pool[1] = (w >> 3) ^ twist_table[w & 7];
- input_rotate = (input_rotate + 7) & 31;
- w = rol32(input[2], input_rotate) ^ f->pool[2] ^ f->pool[1];
- f->pool[2] = (w >> 3) ^ twist_table[w & 7];
- input_rotate = (input_rotate + 7) & 31;
- w = rol32(input[3], input_rotate) ^ f->pool[3] ^ f->pool[2];
- f->pool[3] = (w >> 3) ^ twist_table[w & 7];
- input_rotate = (input_rotate + 7) & 31;
-
- f->rotate = input_rotate;
+ __u32 a = f->pool[0], b = f->pool[1];
+ __u32 c = f->pool[2], d = f->pool[3];
+
+ a += b; c += d;
+ b = rol32(a, 6); d = rol32(c, 27);
+ d ^= a; b ^= c;
+
+ a += b; c += d;
+ b = rol32(a, 16); d = rol32(c, 14);
+ d ^= a; b ^= c;
+
+ a += b; c += d;
+ b = rol32(a, 6); d = rol32(c, 27);
+ d ^= a; b ^= c;
+
+ a += b; c += d;
+ b = rol32(a, 16); d = rol32(c, 14);
+ d ^= a; b ^= c;
+
+ f->pool[0] = a; f->pool[1] = b;
+ f->pool[2] = c; f->pool[3] = d;
f->count++;
}
@@ -657,6 +660,7 @@ retry:
r->entropy_total = 0;
if (r == &nonblocking_pool) {
prandom_reseed_late();
+ wake_up_interruptible(&urandom_init_wait);
pr_notice("random: %s pool is initialized\n", r->name);
}
}
@@ -739,13 +743,13 @@ void add_device_randomness(const void *buf, unsigned int size)
trace_add_device_randomness(size, _RET_IP_);
spin_lock_irqsave(&input_pool.lock, flags);
- _mix_pool_bytes(&input_pool, buf, size, NULL);
- _mix_pool_bytes(&input_pool, &time, sizeof(time), NULL);
+ _mix_pool_bytes(&input_pool, buf, size);
+ _mix_pool_bytes(&input_pool, &time, sizeof(time));
spin_unlock_irqrestore(&input_pool.lock, flags);
spin_lock_irqsave(&nonblocking_pool.lock, flags);
- _mix_pool_bytes(&nonblocking_pool, buf, size, NULL);
- _mix_pool_bytes(&nonblocking_pool, &time, sizeof(time), NULL);
+ _mix_pool_bytes(&nonblocking_pool, buf, size);
+ _mix_pool_bytes(&nonblocking_pool, &time, sizeof(time));
spin_unlock_irqrestore(&nonblocking_pool.lock, flags);
}
EXPORT_SYMBOL(add_device_randomness);
@@ -778,7 +782,7 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num)
sample.cycles = random_get_entropy();
sample.num = num;
r = nonblocking_pool.initialized ? &input_pool : &nonblocking_pool;
- mix_pool_bytes(r, &sample, sizeof(sample), NULL);
+ mix_pool_bytes(r, &sample, sizeof(sample));
/*
* Calculate number of bits of randomness we probably added.
@@ -835,6 +839,38 @@ EXPORT_SYMBOL_GPL(add_input_randomness);
static DEFINE_PER_CPU(struct fast_pool, irq_randomness);
+#ifdef ADD_INTERRUPT_BENCH
+static unsigned long avg_cycles, avg_deviation;
+
+#define AVG_SHIFT 8 /* Exponential average factor k=1/256 */
+#define FIXED_1_2 (1 << (AVG_SHIFT-1))
+
+static void add_interrupt_bench(cycles_t start)
+{
+ long delta = random_get_entropy() - start;
+
+ /* Use a weighted moving average */
+ delta = delta - ((avg_cycles + FIXED_1_2) >> AVG_SHIFT);
+ avg_cycles += delta;
+ /* And average deviation */
+ delta = abs(delta) - ((avg_deviation + FIXED_1_2) >> AVG_SHIFT);
+ avg_deviation += delta;
+}
+#else
+#define add_interrupt_bench(x)
+#endif
+
+static __u32 get_reg(struct fast_pool *f, struct pt_regs *regs)
+{
+ __u32 *ptr = (__u32 *) regs;
+
+ if (regs == NULL)
+ return 0;
+ if (f->reg_idx >= sizeof(struct pt_regs) / sizeof(__u32))
+ f->reg_idx = 0;
+ return *(ptr + f->reg_idx++);
+}
+
void add_interrupt_randomness(int irq, int irq_flags)
{
struct entropy_store *r;
@@ -842,55 +878,52 @@ void add_interrupt_randomness(int irq, int irq_flags)
struct pt_regs *regs = get_irq_regs();
unsigned long now = jiffies;
cycles_t cycles = random_get_entropy();
- __u32 input[4], c_high, j_high;
+ __u32 c_high, j_high;
__u64 ip;
unsigned long seed;
- int credit;
+ int credit = 0;
+ if (cycles == 0)
+ cycles = get_reg(fast_pool, regs);
c_high = (sizeof(cycles) > 4) ? cycles >> 32 : 0;
j_high = (sizeof(now) > 4) ? now >> 32 : 0;
- input[0] = cycles ^ j_high ^ irq;
- input[1] = now ^ c_high;
+ fast_pool->pool[0] ^= cycles ^ j_high ^ irq;
+ fast_pool->pool[1] ^= now ^ c_high;
ip = regs ? instruction_pointer(regs) : _RET_IP_;
- input[2] = ip;
- input[3] = ip >> 32;
+ fast_pool->pool[2] ^= ip;
+ fast_pool->pool[3] ^= (sizeof(ip) > 4) ? ip >> 32 :
+ get_reg(fast_pool, regs);
- fast_mix(fast_pool, input);
+ fast_mix(fast_pool);
+ add_interrupt_bench(cycles);
- if ((fast_pool->count & 63) && !time_after(now, fast_pool->last + HZ))
+ if ((fast_pool->count < 64) &&
+ !time_after(now, fast_pool->last + HZ))
return;
- fast_pool->last = now;
-
r = nonblocking_pool.initialized ? &input_pool : &nonblocking_pool;
- __mix_pool_bytes(r, &fast_pool->pool, sizeof(fast_pool->pool), NULL);
+ if (!spin_trylock(&r->lock))
+ return;
- /*
- * If we don't have a valid cycle counter, and we see
- * back-to-back timer interrupts, then skip giving credit for
- * any entropy, otherwise credit 1 bit.
- */
- credit = 1;
- if (cycles == 0) {
- if (irq_flags & __IRQF_TIMER) {
- if (fast_pool->last_timer_intr)
- credit = 0;
- fast_pool->last_timer_intr = 1;
- } else
- fast_pool->last_timer_intr = 0;
- }
+ fast_pool->last = now;
+ __mix_pool_bytes(r, &fast_pool->pool, sizeof(fast_pool->pool));
/*
* If we have architectural seed generator, produce a seed and
- * add it to the pool. For the sake of paranoia count it as
- * 50% entropic.
+ * add it to the pool. For the sake of paranoia don't let the
+ * architectural seed generator dominate the input from the
+ * interrupt noise.
*/
if (arch_get_random_seed_long(&seed)) {
- __mix_pool_bytes(r, &seed, sizeof(seed), NULL);
- credit += sizeof(seed) * 4;
+ __mix_pool_bytes(r, &seed, sizeof(seed));
+ credit = 1;
}
+ spin_unlock(&r->lock);
- credit_entropy_bits(r, credit);
+ fast_pool->count = 0;
+
+ /* award one bit for the contents of the fast pool */
+ credit_entropy_bits(r, credit + 1);
}
#ifdef CONFIG_BLOCK
@@ -922,6 +955,11 @@ static ssize_t extract_entropy(struct entropy_store *r, void *buf,
static void _xfer_secondary_pool(struct entropy_store *r, size_t nbytes);
static void xfer_secondary_pool(struct entropy_store *r, size_t nbytes)
{
+ if (!r->pull ||
+ r->entropy_count >= (nbytes << (ENTROPY_SHIFT + 3)) ||
+ r->entropy_count > r->poolinfo->poolfracbits)
+ return;
+
if (r->limit == 0 && random_min_urandom_seed) {
unsigned long now = jiffies;
@@ -930,10 +968,8 @@ static void xfer_secondary_pool(struct entropy_store *r, size_t nbytes)
return;
r->last_pulled = now;
}
- if (r->pull &&
- r->entropy_count < (nbytes << (ENTROPY_SHIFT + 3)) &&
- r->entropy_count < r->poolinfo->poolfracbits)
- _xfer_secondary_pool(r, nbytes);
+
+ _xfer_secondary_pool(r, nbytes);
}
static void _xfer_secondary_pool(struct entropy_store *r, size_t nbytes)
@@ -953,7 +989,7 @@ static void _xfer_secondary_pool(struct entropy_store *r, size_t nbytes)
ENTROPY_BITS(r), ENTROPY_BITS(r->pull));
bytes = extract_entropy(r->pull, tmp, bytes,
random_read_wakeup_bits / 8, rsvd_bytes);
- mix_pool_bytes(r, tmp, bytes, NULL);
+ mix_pool_bytes(r, tmp, bytes);
credit_entropy_bits(r, bytes*8);
}
@@ -1039,7 +1075,6 @@ static void extract_buf(struct entropy_store *r, __u8 *out)
unsigned long l[LONGS(20)];
} hash;
__u32 workspace[SHA_WORKSPACE_WORDS];
- __u8 extract[64];
unsigned long flags;
/*
@@ -1068,15 +1103,9 @@ static void extract_buf(struct entropy_store *r, __u8 *out)
* brute-forcing the feedback as hard as brute-forcing the
* hash.
*/
- __mix_pool_bytes(r, hash.w, sizeof(hash.w), extract);
+ __mix_pool_bytes(r, hash.w, sizeof(hash.w));
spin_unlock_irqrestore(&r->lock, flags);
- /*
- * To avoid duplicates, we atomically extract a portion of the
- * pool while mixing, and hash one final time.
- */
- sha_transform(hash.w, extract, workspace);
- memset(extract, 0, sizeof(extract));
memset(workspace, 0, sizeof(workspace));
/*
@@ -1160,13 +1189,14 @@ static ssize_t extract_entropy_user(struct entropy_store *r, void __user *buf,
{
ssize_t ret = 0, i;
__u8 tmp[EXTRACT_SIZE];
+ int large_request = (nbytes > 256);
trace_extract_entropy_user(r->name, nbytes, ENTROPY_BITS(r), _RET_IP_);
xfer_secondary_pool(r, nbytes);
nbytes = account(r, nbytes, 0, 0);
while (nbytes) {
- if (need_resched()) {
+ if (large_request && need_resched()) {
if (signal_pending(current)) {
if (ret == 0)
ret = -ERESTARTSYS;
@@ -1263,14 +1293,14 @@ static void init_std_data(struct entropy_store *r)
unsigned long rv;
r->last_pulled = jiffies;
- mix_pool_bytes(r, &now, sizeof(now), NULL);
+ mix_pool_bytes(r, &now, sizeof(now));
for (i = r->poolinfo->poolbytes; i > 0; i -= sizeof(rv)) {
if (!arch_get_random_seed_long(&rv) &&
!arch_get_random_long(&rv))
rv = random_get_entropy();
- mix_pool_bytes(r, &rv, sizeof(rv), NULL);
+ mix_pool_bytes(r, &rv, sizeof(rv));
}
- mix_pool_bytes(r, utsname(), sizeof(*(utsname())), NULL);
+ mix_pool_bytes(r, utsname(), sizeof(*(utsname())));
}
/*
@@ -1309,39 +1339,8 @@ void rand_initialize_disk(struct gendisk *disk)
}
#endif
-/*
- * Attempt an emergency refill using arch_get_random_seed_long().
- *
- * As with add_interrupt_randomness() be paranoid and only
- * credit the output as 50% entropic.
- */
-static int arch_random_refill(void)
-{
- const unsigned int nlongs = 64; /* Arbitrary number */
- unsigned int n = 0;
- unsigned int i;
- unsigned long buf[nlongs];
-
- if (!arch_has_random_seed())
- return 0;
-
- for (i = 0; i < nlongs; i++) {
- if (arch_get_random_seed_long(&buf[n]))
- n++;
- }
-
- if (n) {
- unsigned int rand_bytes = n * sizeof(unsigned long);
-
- mix_pool_bytes(&input_pool, buf, rand_bytes, NULL);
- credit_entropy_bits(&input_pool, rand_bytes*4);
- }
-
- return n;
-}
-
static ssize_t
-random_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
+_random_read(int nonblock, char __user *buf, size_t nbytes)
{
ssize_t n;
@@ -1360,12 +1359,7 @@ random_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
return n;
/* Pool is (near) empty. Maybe wait and retry. */
-
- /* First try an emergency refill */
- if (arch_random_refill())
- continue;
-
- if (file->f_flags & O_NONBLOCK)
+ if (nonblock)
return -EAGAIN;
wait_event_interruptible(random_read_wait,
@@ -1377,6 +1371,12 @@ random_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
}
static ssize_t
+random_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
+{
+ return _random_read(file->f_flags & O_NONBLOCK, buf, nbytes);
+}
+
+static ssize_t
urandom_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
{
int ret;
@@ -1424,7 +1424,7 @@ write_pool(struct entropy_store *r, const char __user *buffer, size_t count)
count -= bytes;
p += bytes;
- mix_pool_bytes(r, buf, bytes, NULL);
+ mix_pool_bytes(r, buf, bytes);
cond_resched();
}
@@ -1520,6 +1520,29 @@ const struct file_operations urandom_fops = {
.llseek = noop_llseek,
};
+SYSCALL_DEFINE3(getrandom, char __user *, buf, size_t, count,
+ unsigned int, flags)
+{
+ if (flags & ~(GRND_NONBLOCK|GRND_RANDOM))
+ return -EINVAL;
+
+ if (count > INT_MAX)
+ count = INT_MAX;
+
+ if (flags & GRND_RANDOM)
+ return _random_read(flags & GRND_NONBLOCK, buf, count);
+
+ if (unlikely(nonblocking_pool.initialized == 0)) {
+ if (flags & GRND_NONBLOCK)
+ return -EAGAIN;
+ wait_event_interruptible(urandom_init_wait,
+ nonblocking_pool.initialized);
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ }
+ return urandom_read(NULL, buf, count, NULL);
+}
+
/***************************************************************
* Random UUID interface
*
@@ -1663,6 +1686,22 @@ struct ctl_table random_table[] = {
.mode = 0444,
.proc_handler = proc_do_uuid,
},
+#ifdef ADD_INTERRUPT_BENCH
+ {
+ .procname = "add_interrupt_avg_cycles",
+ .data = &avg_cycles,
+ .maxlen = sizeof(avg_cycles),
+ .mode = 0444,
+ .proc_handler = proc_doulongvec_minmax,
+ },
+ {
+ .procname = "add_interrupt_avg_deviation",
+ .data = &avg_deviation,
+ .maxlen = sizeof(avg_deviation),
+ .mode = 0444,
+ .proc_handler = proc_doulongvec_minmax,
+ },
+#endif
{ }
};
#endif /* CONFIG_SYSCTL */
@@ -1719,3 +1758,23 @@ randomize_range(unsigned long start, unsigned long end, unsigned long len)
return 0;
return PAGE_ALIGN(get_random_int() % range + start);
}
+
+/* Interface for in-kernel drivers of true hardware RNGs.
+ * Those devices may produce endless random bits and will be throttled
+ * when our pool is full.
+ */
+void add_hwgenerator_randomness(const char *buffer, size_t count,
+ size_t entropy)
+{
+ struct entropy_store *poolp = &input_pool;
+
+ /* Suspend writing if we're above the trickle threshold.
+ * We'll be woken up again once below random_write_wakeup_thresh,
+ * or when the calling thread is about to terminate.
+ */
+ wait_event_interruptible(random_write_wait, kthread_should_stop() ||
+ ENTROPY_BITS(&input_pool) <= random_write_wakeup_bits);
+ mix_pool_bytes(poolp, buffer, count);
+ credit_entropy_bits(poolp, entropy);
+}
+EXPORT_SYMBOL_GPL(add_hwgenerator_randomness);
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 62e10fd1e1cb..6af17002a115 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -491,11 +491,10 @@ static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
int tpm_get_timeouts(struct tpm_chip *chip)
{
struct tpm_cmd_t tpm_cmd;
- struct timeout_t *timeout_cap;
+ unsigned long new_timeout[4];
+ unsigned long old_timeout[4];
struct duration_t *duration_cap;
ssize_t rc;
- u32 timeout;
- unsigned int scale = 1;
tpm_cmd.header.in = tpm_getcap_header;
tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
@@ -529,25 +528,46 @@ int tpm_get_timeouts(struct tpm_chip *chip)
!= sizeof(tpm_cmd.header.out) + sizeof(u32) + 4 * sizeof(u32))
return -EINVAL;
- timeout_cap = &tpm_cmd.params.getcap_out.cap.timeout;
- /* Don't overwrite default if value is 0 */
- timeout = be32_to_cpu(timeout_cap->a);
- if (timeout && timeout < 1000) {
- /* timeouts in msec rather usec */
- scale = 1000;
- chip->vendor.timeout_adjusted = true;
+ old_timeout[0] = be32_to_cpu(tpm_cmd.params.getcap_out.cap.timeout.a);
+ old_timeout[1] = be32_to_cpu(tpm_cmd.params.getcap_out.cap.timeout.b);
+ old_timeout[2] = be32_to_cpu(tpm_cmd.params.getcap_out.cap.timeout.c);
+ old_timeout[3] = be32_to_cpu(tpm_cmd.params.getcap_out.cap.timeout.d);
+ memcpy(new_timeout, old_timeout, sizeof(new_timeout));
+
+ /*
+ * Provide ability for vendor overrides of timeout values in case
+ * of misreporting.
+ */
+ if (chip->ops->update_timeouts != NULL)
+ chip->vendor.timeout_adjusted =
+ chip->ops->update_timeouts(chip, new_timeout);
+
+ if (!chip->vendor.timeout_adjusted) {
+ /* Don't overwrite default if value is 0 */
+ if (new_timeout[0] != 0 && new_timeout[0] < 1000) {
+ int i;
+
+ /* timeouts in msec rather usec */
+ for (i = 0; i != ARRAY_SIZE(new_timeout); i++)
+ new_timeout[i] *= 1000;
+ chip->vendor.timeout_adjusted = true;
+ }
+ }
+
+ /* Report adjusted timeouts */
+ if (chip->vendor.timeout_adjusted) {
+ dev_info(chip->dev,
+ HW_ERR "Adjusting reported timeouts: A %lu->%luus B %lu->%luus C %lu->%luus D %lu->%luus\n",
+ old_timeout[0], new_timeout[0],
+ old_timeout[1], new_timeout[1],
+ old_timeout[2], new_timeout[2],
+ old_timeout[3], new_timeout[3]);
}
- if (timeout)
- chip->vendor.timeout_a = usecs_to_jiffies(timeout * scale);
- timeout = be32_to_cpu(timeout_cap->b);
- if (timeout)
- chip->vendor.timeout_b = usecs_to_jiffies(timeout * scale);
- timeout = be32_to_cpu(timeout_cap->c);
- if (timeout)
- chip->vendor.timeout_c = usecs_to_jiffies(timeout * scale);
- timeout = be32_to_cpu(timeout_cap->d);
- if (timeout)
- chip->vendor.timeout_d = usecs_to_jiffies(timeout * scale);
+
+ chip->vendor.timeout_a = usecs_to_jiffies(new_timeout[0]);
+ chip->vendor.timeout_b = usecs_to_jiffies(new_timeout[1]);
+ chip->vendor.timeout_c = usecs_to_jiffies(new_timeout[2]);
+ chip->vendor.timeout_d = usecs_to_jiffies(new_timeout[3]);
duration:
tpm_cmd.header.in = tpm_getcap_header;
@@ -991,13 +1011,13 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
int err, total = 0, retries = 5;
u8 *dest = out;
+ if (!out || !num_bytes || max > TPM_MAX_RNG_DATA)
+ return -EINVAL;
+
chip = tpm_chip_find_get(chip_num);
if (chip == NULL)
return -ENODEV;
- if (!out || !num_bytes || max > TPM_MAX_RNG_DATA)
- return -EINVAL;
-
do {
tpm_cmd.header.in = tpm_getrandom_header;
tpm_cmd.params.getrandom_in.num_bytes = cpu_to_be32(num_bytes);
@@ -1016,6 +1036,7 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
num_bytes -= recd;
} while (retries-- && total < max);
+ tpm_chip_put(chip);
return total ? total : -EIO;
}
EXPORT_SYMBOL_GPL(tpm_get_random);
@@ -1095,7 +1116,7 @@ struct tpm_chip *tpm_register_hardware(struct device *dev,
goto del_misc;
if (tpm_add_ppi(&dev->kobj))
- goto del_misc;
+ goto del_sysfs;
chip->bios_dir = tpm_bios_log_setup(chip->devname);
@@ -1106,6 +1127,8 @@ struct tpm_chip *tpm_register_hardware(struct device *dev,
return chip;
+del_sysfs:
+ tpm_sysfs_del_device(chip);
del_misc:
tpm_dev_del_device(chip);
put_device:
diff --git a/drivers/char/tpm/tpm_eventlog.c b/drivers/char/tpm/tpm_eventlog.c
index 59f7cb28260b..3a56a131586c 100644
--- a/drivers/char/tpm/tpm_eventlog.c
+++ b/drivers/char/tpm/tpm_eventlog.c
@@ -235,7 +235,6 @@ static int tpm_bios_measurements_release(struct inode *inode,
static int tpm_ascii_bios_measurements_show(struct seq_file *m, void *v)
{
int len = 0;
- int i;
char *eventname;
struct tcpa_event *event = v;
unsigned char *event_entry =
@@ -251,8 +250,7 @@ static int tpm_ascii_bios_measurements_show(struct seq_file *m, void *v)
seq_printf(m, "%2d ", event->pcr_index);
/* 2nd: SHA1 */
- for (i = 0; i < 20; i++)
- seq_printf(m, "%02x", event->pcr_value[i]);
+ seq_printf(m, "%20phN", event->pcr_value);
/* 3rd: event type identifier */
seq_printf(m, " %02x", event->event_type);
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index 3b7bf2162898..4669e3713428 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -714,6 +714,7 @@ tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
}
tpm_get_timeouts(chip);
+ tpm_do_selftest(chip);
dev_info(chip->dev, "TPM I2C Initialized\n");
return 0;
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index a9ed2270c25d..2c46734b266d 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -373,6 +373,36 @@ out_err:
return rc;
}
+struct tis_vendor_timeout_override {
+ u32 did_vid;
+ unsigned long timeout_us[4];
+};
+
+static const struct tis_vendor_timeout_override vendor_timeout_overrides[] = {
+ /* Atmel 3204 */
+ { 0x32041114, { (TIS_SHORT_TIMEOUT*1000), (TIS_LONG_TIMEOUT*1000),
+ (TIS_SHORT_TIMEOUT*1000), (TIS_SHORT_TIMEOUT*1000) } },
+};
+
+static bool tpm_tis_update_timeouts(struct tpm_chip *chip,
+ unsigned long *timeout_cap)
+{
+ int i;
+ u32 did_vid;
+
+ did_vid = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
+
+ for (i = 0; i != ARRAY_SIZE(vendor_timeout_overrides); i++) {
+ if (vendor_timeout_overrides[i].did_vid != did_vid)
+ continue;
+ memcpy(timeout_cap, vendor_timeout_overrides[i].timeout_us,
+ sizeof(vendor_timeout_overrides[i].timeout_us));
+ return true;
+ }
+
+ return false;
+}
+
/*
* Early probing for iTPM with STS_DATA_EXPECT flaw.
* Try sending command without itpm flag set and if that
@@ -437,6 +467,7 @@ static const struct tpm_class_ops tpm_tis = {
.recv = tpm_tis_recv,
.send = tpm_tis_send,
.cancel = tpm_tis_ready,
+ .update_timeouts = tpm_tis_update_timeouts,
.req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
.req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
.req_canceled = tpm_tis_req_canceled,
diff --git a/drivers/char/xilinx_hwicap/xilinx_hwicap.c b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
index f6345f932e46..9b1a5ac4881d 100644
--- a/drivers/char/xilinx_hwicap/xilinx_hwicap.c
+++ b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
@@ -661,6 +661,7 @@ static int hwicap_setup(struct device *dev, int id,
drvdata->base_address = ioremap(drvdata->mem_start, drvdata->mem_size);
if (!drvdata->base_address) {
dev_err(dev, "ioremap() failed\n");
+ retval = -ENOMEM;
goto failed2;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-10 06:17:57 +0300