diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/applicom.c | 1 | ||||
| -rw-r--r-- | drivers/char/hw_random/Kconfig | 101 | ||||
| -rw-r--r-- | drivers/char/hw_random/Makefile | 1 | ||||
| -rw-r--r-- | drivers/char/hw_random/n2-drv.c | 24 | ||||
| -rw-r--r-- | drivers/char/hw_random/omap-rng.c | 4 | ||||
| -rw-r--r-- | drivers/char/hw_random/picoxcell-rng.c | 181 | ||||
| -rw-r--r-- | drivers/char/hw_random/timeriomem-rng.c | 4 | ||||
| -rw-r--r-- | drivers/char/hw_random/virtio-rng.c | 105 | ||||
| -rw-r--r-- | drivers/char/ipmi/ipmi_si_intf.c | 2 | ||||
| -rw-r--r-- | drivers/char/random.c | 5 | ||||
| -rw-r--r-- | drivers/char/raw.c | 8 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_acpi.c | 4 |
12 files changed, 135 insertions, 305 deletions
diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c index 974321a2508d..14790304b84b 100644 --- a/drivers/char/applicom.c +++ b/drivers/char/applicom.c @@ -345,7 +345,6 @@ out: free_irq(apbs[i].irq, &dummy); iounmap(apbs[i].RamIO); } - pci_disable_device(dev); return ret; } diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index 244759bbd7b7..836b061ced35 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -2,7 +2,7 @@ # Hardware Random Number Generator (RNG) configuration # -config HW_RANDOM +menuconfig HW_RANDOM tristate "Hardware Random Number Generator Core support" default m ---help--- @@ -20,9 +20,11 @@ config HW_RANDOM If unsure, say Y. +if HW_RANDOM + config HW_RANDOM_TIMERIOMEM tristate "Timer IOMEM HW Random Number Generator support" - depends on HW_RANDOM && HAS_IOMEM + depends on HAS_IOMEM ---help--- This driver provides kernel-side support for a generic Random Number Generator used by reading a 'dumb' iomem address that @@ -36,7 +38,7 @@ config HW_RANDOM_TIMERIOMEM config HW_RANDOM_INTEL tristate "Intel HW Random Number Generator support" - depends on HW_RANDOM && (X86 || IA64) && PCI + depends on (X86 || IA64) && PCI default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -49,7 +51,7 @@ config HW_RANDOM_INTEL config HW_RANDOM_AMD tristate "AMD HW Random Number Generator support" - depends on HW_RANDOM && (X86 || PPC_MAPLE) && PCI + depends on (X86 || PPC_MAPLE) && PCI default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -62,8 +64,8 @@ config HW_RANDOM_AMD config HW_RANDOM_ATMEL tristate "Atmel Random Number Generator support" - depends on HW_RANDOM && HAVE_CLK - default (HW_RANDOM && ARCH_AT91) + depends on ARCH_AT91 && HAVE_CLK + default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number Generator hardware found on Atmel AT91 devices. @@ -75,7 +77,7 @@ config HW_RANDOM_ATMEL config HW_RANDOM_BCM63XX tristate "Broadcom BCM63xx Random Number Generator support" - depends on HW_RANDOM && BCM63XX + depends on BCM63XX default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -88,7 +90,7 @@ config HW_RANDOM_BCM63XX config HW_RANDOM_BCM2835 tristate "Broadcom BCM2835 Random Number Generator support" - depends on HW_RANDOM && ARCH_BCM2835 + depends on ARCH_BCM2835 default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -101,7 +103,7 @@ config HW_RANDOM_BCM2835 config HW_RANDOM_GEODE tristate "AMD Geode HW Random Number Generator support" - depends on HW_RANDOM && X86_32 && PCI + depends on X86_32 && PCI default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -114,7 +116,7 @@ config HW_RANDOM_GEODE config HW_RANDOM_N2RNG tristate "Niagara2 Random Number Generator support" - depends on HW_RANDOM && SPARC64 + depends on SPARC64 default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -127,7 +129,7 @@ config HW_RANDOM_N2RNG config HW_RANDOM_VIA tristate "VIA HW Random Number Generator support" - depends on HW_RANDOM && X86 + depends on X86 default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -140,7 +142,7 @@ config HW_RANDOM_VIA config HW_RANDOM_IXP4XX tristate "Intel IXP4xx NPU HW Pseudo-Random Number Generator support" - depends on HW_RANDOM && ARCH_IXP4XX + depends on ARCH_IXP4XX default HW_RANDOM ---help--- This driver provides kernel-side support for the Pseudo-Random @@ -153,7 +155,7 @@ config HW_RANDOM_IXP4XX config HW_RANDOM_OMAP tristate "OMAP Random Number Generator support" - depends on HW_RANDOM && (ARCH_OMAP16XX || ARCH_OMAP2PLUS) + depends on ARCH_OMAP16XX || ARCH_OMAP2PLUS default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -167,7 +169,7 @@ config HW_RANDOM_OMAP config HW_RANDOM_OMAP3_ROM tristate "OMAP3 ROM Random Number Generator support" - depends on HW_RANDOM && ARCH_OMAP3 + depends on ARCH_OMAP3 default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -180,7 +182,7 @@ config HW_RANDOM_OMAP3_ROM config HW_RANDOM_OCTEON tristate "Octeon Random Number Generator support" - depends on HW_RANDOM && CAVIUM_OCTEON_SOC + depends on CAVIUM_OCTEON_SOC default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -193,7 +195,7 @@ config HW_RANDOM_OCTEON config HW_RANDOM_PASEMI tristate "PA Semi HW Random Number Generator support" - depends on HW_RANDOM && PPC_PASEMI + depends on PPC_PASEMI default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -206,7 +208,7 @@ config HW_RANDOM_PASEMI config HW_RANDOM_VIRTIO tristate "VirtIO Random Number Generator support" - depends on HW_RANDOM && VIRTIO + depends on VIRTIO ---help--- This driver provides kernel-side support for the virtual Random Number Generator hardware. @@ -216,7 +218,7 @@ config HW_RANDOM_VIRTIO config HW_RANDOM_TX4939 tristate "TX4939 Random Number Generator support" - depends on HW_RANDOM && SOC_TX4939 + depends on SOC_TX4939 default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -229,7 +231,8 @@ config HW_RANDOM_TX4939 config HW_RANDOM_MXC_RNGA tristate "Freescale i.MX RNGA Random Number Generator" - depends on HW_RANDOM && ARCH_HAS_RNGA + depends on ARCH_HAS_RNGA + default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number Generator hardware found on Freescale i.MX processors. @@ -241,7 +244,8 @@ config HW_RANDOM_MXC_RNGA config HW_RANDOM_NOMADIK tristate "ST-Ericsson Nomadik Random Number Generator support" - depends on HW_RANDOM && ARCH_NOMADIK + depends on ARCH_NOMADIK + default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number Generator hardware found on ST-Ericsson SoCs (8815 and 8500). @@ -251,21 +255,10 @@ config HW_RANDOM_NOMADIK If unsure, say Y. -config HW_RANDOM_PICOXCELL - tristate "Picochip picoXcell true random number generator support" - depends on HW_RANDOM && ARCH_PICOXCELL && PICOXCELL_PC3X3 - ---help--- - This driver provides kernel-side support for the Random Number - Generator hardware found on Picochip PC3x3 and later devices. - - To compile this driver as a module, choose M here: the - module will be called picoxcell-rng. - - If unsure, say Y. - config HW_RANDOM_PPC4XX tristate "PowerPC 4xx generic true random number generator support" - depends on HW_RANDOM && PPC && 4xx + depends on PPC && 4xx + default HW_RANDOM ---help--- This driver provides the kernel-side support for the TRNG hardware found in the security function of some PowerPC 4xx SoCs. @@ -275,24 +268,9 @@ config HW_RANDOM_PPC4XX If unsure, say N. -config UML_RANDOM - depends on UML - tristate "Hardware random number generator" - help - This option enables UML's "hardware" random number generator. It - attaches itself to the host's /dev/random, supplying as much entropy - as the host has, rather than the small amount the UML gets from its - own drivers. It registers itself as a standard hardware random number - generator, major 10, minor 183, and the canonical device name is - /dev/hwrng. - The way to make use of this is to install the rng-tools package - (check your distro, or download from - http://sourceforge.net/projects/gkernel/). rngd periodically reads - /dev/hwrng and injects the entropy into /dev/random. - config HW_RANDOM_PSERIES tristate "pSeries HW Random Number Generator support" - depends on HW_RANDOM && PPC64 && IBMVIO + depends on PPC64 && IBMVIO default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -305,7 +283,7 @@ config HW_RANDOM_PSERIES config HW_RANDOM_POWERNV tristate "PowerNV Random Number Generator support" - depends on HW_RANDOM && PPC_POWERNV + depends on PPC_POWERNV default HW_RANDOM ---help--- This is the driver for Random Number Generator hardware found @@ -318,7 +296,8 @@ config HW_RANDOM_POWERNV config HW_RANDOM_EXYNOS tristate "EXYNOS HW random number generator support" - depends on HW_RANDOM && HAS_IOMEM && HAVE_CLK + depends on ARCH_EXYNOS + default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number Generator hardware found on EXYNOS SOCs. @@ -330,7 +309,7 @@ config HW_RANDOM_EXYNOS config HW_RANDOM_TPM tristate "TPM HW Random Number Generator support" - depends on HW_RANDOM && TCG_TPM + depends on TCG_TPM default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number @@ -344,6 +323,7 @@ config HW_RANDOM_TPM config HW_RANDOM_MSM tristate "Qualcomm SoCs Random Number Generator support" depends on HW_RANDOM && ARCH_QCOM + default HW_RANDOM ---help--- This driver provides kernel-side support for the Random Number Generator hardware found on Qualcomm SoCs. @@ -352,3 +332,20 @@ config HW_RANDOM_MSM module will be called msm-rng. If unsure, say Y. + +endif # HW_RANDOM + +config UML_RANDOM + depends on UML + tristate "Hardware random number generator" + help + This option enables UML's "hardware" random number generator. It + attaches itself to the host's /dev/random, supplying as much entropy + as the host has, rather than the small amount the UML gets from its + own drivers. It registers itself as a standard hardware random number + generator, major 10, minor 183, and the canonical device name is + /dev/hwrng. + The way to make use of this is to install the rng-tools package + (check your distro, or download from + http://sourceforge.net/projects/gkernel/). rngd periodically reads + /dev/hwrng and injects the entropy into /dev/random. diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile index 3ae7755a52e7..199ed283e149 100644 --- a/drivers/char/hw_random/Makefile +++ b/drivers/char/hw_random/Makefile @@ -22,7 +22,6 @@ obj-$(CONFIG_HW_RANDOM_TX4939) += tx4939-rng.o obj-$(CONFIG_HW_RANDOM_MXC_RNGA) += mxc-rnga.o obj-$(CONFIG_HW_RANDOM_OCTEON) += octeon-rng.o obj-$(CONFIG_HW_RANDOM_NOMADIK) += nomadik-rng.o -obj-$(CONFIG_HW_RANDOM_PICOXCELL) += picoxcell-rng.o obj-$(CONFIG_HW_RANDOM_PPC4XX) += ppc4xx-rng.o obj-$(CONFIG_HW_RANDOM_PSERIES) += pseries-rng.o obj-$(CONFIG_HW_RANDOM_POWERNV) += powernv-rng.o diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c index 432232eefe05..292a5889f675 100644 --- a/drivers/char/hw_random/n2-drv.c +++ b/drivers/char/hw_random/n2-drv.c @@ -632,7 +632,7 @@ static int n2rng_probe(struct platform_device *op) multi_capable = (match->data != NULL); n2rng_driver_version(); - np = kzalloc(sizeof(*np), GFP_KERNEL); + np = devm_kzalloc(&op->dev, sizeof(*np), GFP_KERNEL); if (!np) goto out; np->op = op; @@ -653,7 +653,7 @@ static int n2rng_probe(struct platform_device *op) &np->hvapi_minor)) { dev_err(&op->dev, "Cannot register suitable " "HVAPI version.\n"); - goto out_free; + goto out; } } @@ -676,15 +676,16 @@ static int n2rng_probe(struct platform_device *op) dev_info(&op->dev, "Registered RNG HVAPI major %lu minor %lu\n", np->hvapi_major, np->hvapi_minor); - np->units = kzalloc(sizeof(struct n2rng_unit) * np->num_units, - GFP_KERNEL); + np->units = devm_kzalloc(&op->dev, + sizeof(struct n2rng_unit) * np->num_units, + GFP_KERNEL); err = -ENOMEM; if (!np->units) goto out_hvapi_unregister; err = n2rng_init_control(np); if (err) - goto out_free_units; + goto out_hvapi_unregister; dev_info(&op->dev, "Found %s RNG, units: %d\n", ((np->flags & N2RNG_FLAG_MULTI) ? @@ -697,7 +698,7 @@ static int n2rng_probe(struct platform_device *op) err = hwrng_register(&np->hwrng); if (err) - goto out_free_units; + goto out_hvapi_unregister; platform_set_drvdata(op, np); @@ -705,15 +706,9 @@ static int n2rng_probe(struct platform_device *op) return 0; -out_free_units: - kfree(np->units); - np->units = NULL; - out_hvapi_unregister: sun4v_hvapi_unregister(HV_GRP_RNG); -out_free: - kfree(np); out: return err; } @@ -730,11 +725,6 @@ static int n2rng_remove(struct platform_device *op) sun4v_hvapi_unregister(HV_GRP_RNG); - kfree(np->units); - np->units = NULL; - - kfree(np); - return 0; } diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c index 9b89ff4881de..f66ea258382f 100644 --- a/drivers/char/hw_random/omap-rng.c +++ b/drivers/char/hw_random/omap-rng.c @@ -369,10 +369,8 @@ static int omap_rng_probe(struct platform_device *pdev) int ret; priv = devm_kzalloc(dev, sizeof(struct omap_rng_dev), GFP_KERNEL); - if (!priv) { - dev_err(&pdev->dev, "could not allocate memory\n"); + if (!priv) return -ENOMEM; - }; omap_rng_ops.priv = (unsigned long)priv; platform_set_drvdata(pdev, priv); diff --git a/drivers/char/hw_random/picoxcell-rng.c b/drivers/char/hw_random/picoxcell-rng.c deleted file mode 100644 index eab5448ad56f..000000000000 --- a/drivers/char/hw_random/picoxcell-rng.c +++ /dev/null @@ -1,181 +0,0 @@ -/* - * Copyright (c) 2010-2011 Picochip Ltd., Jamie Iles - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * All enquiries to support@picochip.com - */ -#include <linux/clk.h> -#include <linux/delay.h> -#include <linux/err.h> -#include <linux/hw_random.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> - -#define DATA_REG_OFFSET 0x0200 -#define CSR_REG_OFFSET 0x0278 -#define CSR_OUT_EMPTY_MASK (1 << 24) -#define CSR_FAULT_MASK (1 << 1) -#define TRNG_BLOCK_RESET_MASK (1 << 0) -#define TAI_REG_OFFSET 0x0380 - -/* - * The maximum amount of time in microseconds to spend waiting for data if the - * core wants us to wait. The TRNG should generate 32 bits every 320ns so a - * timeout of 20us seems reasonable. The TRNG does builtin tests of the data - * for randomness so we can't always assume there is data present. - */ -#define PICO_TRNG_TIMEOUT 20 - -static void __iomem *rng_base; -static struct clk *rng_clk; -static struct device *rng_dev; - -static inline u32 picoxcell_trng_read_csr(void) -{ - return __raw_readl(rng_base + CSR_REG_OFFSET); -} - -static inline bool picoxcell_trng_is_empty(void) -{ - return picoxcell_trng_read_csr() & CSR_OUT_EMPTY_MASK; -} - -/* - * Take the random number generator out of reset and make sure the interrupts - * are masked. We shouldn't need to get large amounts of random bytes so just - * poll the status register. The hardware generates 32 bits every 320ns so we - * shouldn't have to wait long enough to warrant waiting for an IRQ. - */ -static void picoxcell_trng_start(void) -{ - __raw_writel(0, rng_base + TAI_REG_OFFSET); - __raw_writel(0, rng_base + CSR_REG_OFFSET); -} - -static void picoxcell_trng_reset(void) -{ - __raw_writel(TRNG_BLOCK_RESET_MASK, rng_base + CSR_REG_OFFSET); - __raw_writel(TRNG_BLOCK_RESET_MASK, rng_base + TAI_REG_OFFSET); - picoxcell_trng_start(); -} - -/* - * Get some random data from the random number generator. The hw_random core - * layer provides us with locking. - */ -static int picoxcell_trng_read(struct hwrng *rng, void *buf, size_t max, - bool wait) -{ - int i; - - /* Wait for some data to become available. */ - for (i = 0; i < PICO_TRNG_TIMEOUT && picoxcell_trng_is_empty(); ++i) { - if (!wait) - return 0; - - udelay(1); - } - - if (picoxcell_trng_read_csr() & CSR_FAULT_MASK) { - dev_err(rng_dev, "fault detected, resetting TRNG\n"); - picoxcell_trng_reset(); - return -EIO; - } - - if (i == PICO_TRNG_TIMEOUT) - return 0; - - *(u32 *)buf = __raw_readl(rng_base + DATA_REG_OFFSET); - return sizeof(u32); -} - -static struct hwrng picoxcell_trng = { - .name = "picoxcell", - .read = picoxcell_trng_read, -}; - -static int picoxcell_trng_probe(struct platform_device *pdev) -{ - int ret; - struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - rng_base = devm_ioremap_resource(&pdev->dev, mem); - if (IS_ERR(rng_base)) - return PTR_ERR(rng_base); - - rng_clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(rng_clk)) { - dev_warn(&pdev->dev, "no clk\n"); - return PTR_ERR(rng_clk); - } - - ret = clk_enable(rng_clk); - if (ret) { - dev_warn(&pdev->dev, "unable to enable clk\n"); - return ret; - } - - picoxcell_trng_start(); - ret = hwrng_register(&picoxcell_trng); - if (ret) - goto err_register; - - rng_dev = &pdev->dev; - dev_info(&pdev->dev, "pixoxcell random number generator active\n"); - - return 0; - -err_register: - clk_disable(rng_clk); - return ret; -} - -static int picoxcell_trng_remove(struct platform_device *pdev) -{ - hwrng_unregister(&picoxcell_trng); - clk_disable(rng_clk); - - return 0; -} - -#ifdef CONFIG_PM -static int picoxcell_trng_suspend(struct device *dev) -{ - clk_disable(rng_clk); - - return 0; -} - -static int picoxcell_trng_resume(struct device *dev) -{ - return clk_enable(rng_clk); -} - -static const struct dev_pm_ops picoxcell_trng_pm_ops = { - .suspend = picoxcell_trng_suspend, - .resume = picoxcell_trng_resume, -}; -#endif /* CONFIG_PM */ - -static struct platform_driver picoxcell_trng_driver = { - .probe = picoxcell_trng_probe, - .remove = picoxcell_trng_remove, - .driver = { - .name = "picoxcell-trng", - .owner = THIS_MODULE, -#ifdef CONFIG_PM - .pm = &picoxcell_trng_pm_ops, -#endif /* CONFIG_PM */ - }, -}; - -module_platform_driver(picoxcell_trng_driver); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Jamie Iles"); -MODULE_DESCRIPTION("Picochip picoXcell TRNG driver"); diff --git a/drivers/char/hw_random/timeriomem-rng.c b/drivers/char/hw_random/timeriomem-rng.c index 439ff8b28c43..b6ab9ac3f34d 100644 --- a/drivers/char/hw_random/timeriomem-rng.c +++ b/drivers/char/hw_random/timeriomem-rng.c @@ -120,10 +120,8 @@ static int timeriomem_rng_probe(struct platform_device *pdev) /* Allocate memory for the device structure (and zero it) */ priv = devm_kzalloc(&pdev->dev, sizeof(struct timeriomem_rng_private_data), GFP_KERNEL); - if (!priv) { - dev_err(&pdev->dev, "failed to allocate device structure.\n"); + if (!priv) return -ENOMEM; - } platform_set_drvdata(pdev, priv); diff --git a/drivers/char/hw_random/virtio-rng.c b/drivers/char/hw_random/virtio-rng.c index 2ce0e225e58c..f3e71501de54 100644 --- a/drivers/char/hw_random/virtio-rng.c +++ b/drivers/char/hw_random/virtio-rng.c @@ -25,88 +25,115 @@ #include <linux/virtio_rng.h> #include <linux/module.h> -static struct virtqueue *vq; -static unsigned int data_avail; -static DECLARE_COMPLETION(have_data); -static bool busy; +static DEFINE_IDA(rng_index_ida); + +struct virtrng_info { + struct virtio_device *vdev; + struct hwrng hwrng; + struct virtqueue *vq; + unsigned int data_avail; + struct completion have_data; + bool busy; + char name[25]; + int index; +}; static void random_recv_done(struct virtqueue *vq) { + struct virtrng_info *vi = vq->vdev->priv; + /* We can get spurious callbacks, e.g. shared IRQs + virtio_pci. */ - if (!virtqueue_get_buf(vq, &data_avail)) + if (!virtqueue_get_buf(vi->vq, &vi->data_avail)) return; - complete(&have_data); + complete(&vi->have_data); } /* The host will fill any buffer we give it with sweet, sweet randomness. */ -static void register_buffer(u8 *buf, size_t size) +static void register_buffer(struct virtrng_info *vi, u8 *buf, size_t size) { struct scatterlist sg; sg_init_one(&sg, buf, size); /* There should always be room for one buffer. */ - virtqueue_add_inbuf(vq, &sg, 1, buf, GFP_KERNEL); + virtqueue_add_inbuf(vi->vq, &sg, 1, buf, GFP_KERNEL); - virtqueue_kick(vq); + virtqueue_kick(vi->vq); } static int virtio_read(struct hwrng *rng, void *buf, size_t size, bool wait) { int ret; + struct virtrng_info *vi = (struct virtrng_info *)rng->priv; - if (!busy) { - busy = true; - init_completion(&have_data); - register_buffer(buf, size); + if (!vi->busy) { + vi->busy = true; + init_completion(&vi->have_data); + register_buffer(vi, buf, size); } if (!wait) return 0; - ret = wait_for_completion_killable(&have_data); + ret = wait_for_completion_killable(&vi->have_data); if (ret < 0) return ret; - busy = false; + vi->busy = false; - return data_avail; + return vi->data_avail; } static void virtio_cleanup(struct hwrng *rng) { - if (busy) - wait_for_completion(&have_data); -} + struct virtrng_info *vi = (struct virtrng_info *)rng->priv; - -static struct hwrng virtio_hwrng = { - .name = "virtio", - .cleanup = virtio_cleanup, - .read = virtio_read, -}; + if (vi->busy) + wait_for_completion(&vi->have_data); +} static int probe_common(struct virtio_device *vdev) { - int err; + int err, index; + struct virtrng_info *vi = NULL; + + vi = kzalloc(sizeof(struct virtrng_info), GFP_KERNEL); + if (!vi) + return -ENOMEM; - if (vq) { - /* We only support one device for now */ - return -EBUSY; + vi->index = index = ida_simple_get(&rng_index_ida, 0, 0, GFP_KERNEL); + if (index < 0) { + kfree(vi); + return index; } + sprintf(vi->name, "virtio_rng.%d", index); + init_completion(&vi->have_data); + + vi->hwrng = (struct hwrng) { + .read = virtio_read, + .cleanup = virtio_cleanup, + .priv = (unsigned long)vi, + .name = vi->name, + }; + vdev->priv = vi; + /* We expect a single virtqueue. */ - vq = virtio_find_single_vq(vdev, random_recv_done, "input"); - if (IS_ERR(vq)) { - err = PTR_ERR(vq); - vq = NULL; + vi->vq = virtio_find_single_vq(vdev, random_recv_done, "input"); + if (IS_ERR(vi->vq)) { + err = PTR_ERR(vi->vq); + vi->vq = NULL; + kfree(vi); + ida_simple_remove(&rng_index_ida, index); return err; } - err = hwrng_register(&virtio_hwrng); + err = hwrng_register(&vi->hwrng); if (err) { vdev->config->del_vqs(vdev); - vq = NULL; + vi->vq = NULL; + kfree(vi); + ida_simple_remove(&rng_index_ida, index); return err; } @@ -115,11 +142,13 @@ static int probe_common(struct virtio_device *vdev) static void remove_common(struct virtio_device *vdev) { + struct virtrng_info *vi = vdev->priv; vdev->config->reset(vdev); - busy = false; - hwrng_unregister(&virtio_hwrng); + vi->busy = false; + hwrng_unregister(&vi->hwrng); vdev->config->del_vqs(vdev); - vq = NULL; + ida_simple_remove(&rng_index_ida, vi->index); + kfree(vi); } static int virtrng_probe(struct virtio_device *vdev) diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index 1c4bb4f6ce93..5d665680ae33 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -1007,7 +1007,7 @@ static int ipmi_thread(void *data) struct timespec busy_until; ipmi_si_set_not_busy(&busy_until); - set_user_nice(current, 19); + set_user_nice(current, MAX_NICE); while (!kthread_should_stop()) { int busy_wait; diff --git a/drivers/char/random.c b/drivers/char/random.c index 2b6e4cd8de8e..0a7ac0a7b252 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -902,6 +902,7 @@ void add_disk_randomness(struct gendisk *disk) add_timer_randomness(disk->random, 0x100 + disk_devt(disk)); trace_add_disk_randomness(disk_devt(disk), ENTROPY_BITS(&input_pool)); } +EXPORT_SYMBOL_GPL(add_disk_randomness); #endif /********************************************************************* @@ -1582,10 +1583,10 @@ static int proc_do_uuid(struct ctl_table *table, int write, /* * Return entropy available scaled to integral bits */ -static int proc_do_entropy(ctl_table *table, int write, +static int proc_do_entropy(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { - ctl_table fake_table; + struct ctl_table fake_table; int entropy_count; entropy_count = *(int *)table->data >> ENTROPY_SHIFT; diff --git a/drivers/char/raw.c b/drivers/char/raw.c index 6e8d65e9b1d3..0102dc788608 100644 --- a/drivers/char/raw.c +++ b/drivers/char/raw.c @@ -284,10 +284,10 @@ static long raw_ctl_compat_ioctl(struct file *file, unsigned int cmd, #endif static const struct file_operations raw_fops = { - .read = do_sync_read, - .aio_read = generic_file_aio_read, - .write = do_sync_write, - .aio_write = blkdev_aio_write, + .read = new_sync_read, + .read_iter = generic_file_read_iter, + .write = new_sync_write, + .write_iter = blkdev_write_iter, .fsync = blkdev_fsync, .open = raw_open, .release = raw_release, diff --git a/drivers/char/tpm/tpm_acpi.c b/drivers/char/tpm/tpm_acpi.c index b9a57fa4b710..565a9478cb94 100644 --- a/drivers/char/tpm/tpm_acpi.c +++ b/drivers/char/tpm/tpm_acpi.c @@ -95,7 +95,7 @@ int read_log(struct tpm_bios_log *log) log->bios_event_log_end = log->bios_event_log + len; - virt = acpi_os_map_memory(start, len); + virt = acpi_os_map_iomem(start, len); if (!virt) { kfree(log->bios_event_log); printk("%s: ERROR - Unable to map memory\n", __func__); @@ -104,6 +104,6 @@ int read_log(struct tpm_bios_log *log) memcpy_fromio(log->bios_event_log, virt, len); - acpi_os_unmap_memory(virt, len); + acpi_os_unmap_iomem(virt, len); return 0; } |