Merge tag 'v4.19-rc6' into for-4.20/block

Merge -rc6 in, for two reasons:

1) Resolve a trivial conflict in the blk-mq-tag.c documentation
2) A few important regression fixes went into upstream directly, so
   they aren't in the 4.20 branch.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

* tag 'v4.19-rc6': (780 commits)
  Linux 4.19-rc6
  MAINTAINERS: fix reference to moved drivers/{misc => auxdisplay}/panel.c
  cpufreq: qcom-kryo: Fix section annotations
  perf/core: Add sanity check to deal with pinned event failure
  xen/blkfront: correct purging of persistent grants
  Revert "xen/blkfront: When purging persistent grants, keep them in the buffer"
  selftests/powerpc: Fix Makefiles for headers_install change
  blk-mq: I/O and timer unplugs are inverted in blktrace
  dax: Fix deadlock in dax_lock_mapping_entry()
  x86/boot: Fix kexec booting failure in the SEV bit detection code
  bcache: add separate workqueue for journal_write to avoid deadlock
  drm/amd/display: Fix Edid emulation for linux
  drm/amd/display: Fix Vega10 lightup on S3 resume
  drm/amdgpu: Fix vce work queue was not cancelled when suspend
  Revert "drm/panel: Add device_link from panel device to DRM device"
  xen/blkfront: When purging persistent grants, keep them in the buffer
  clocksource/drivers/timer-atmel-pit: Properly handle error cases
  block: fix deadline elevator drain for zoned block devices
  ACPI / hotplug / PCI: Don't scan for non-hotplug bridges if slot is not bridge
  drm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set
  ...

Signed-off-by: Jens Axboe <axboe@kernel.dk>

4 files changed, 43 insertions, 58 deletions

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index ec891bc7d10a..f039266b275d 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -872,8 +872,6 @@ static int hex2bitmap(const char *str, unsigned long *bitmap, int bits)
 	if (bits & 0x07)
 		return -EINVAL;
 
-	memset(bitmap, 0, bits / 8);
-
 	if (str[0] == '0' && str[1] == 'x')
 		str++;
 	if (*str == 'x')
@@ -895,25 +893,23 @@ static int hex2bitmap(const char *str, unsigned long *bitmap, int bits)
 }
 
 /*
- * str2clrsetmasks() - parse bitmask argument and set the clear and
- * the set bitmap mask. A concatenation (done with ',') of these terms
- * is recognized:
+ * modify_bitmap() - parse bitmask argument and modify an existing
+ * bit mask accordingly. A concatenation (done with ',') of these
+ * terms is recognized:
  *   +<bitnr>[-<bitnr>] or -<bitnr>[-<bitnr>]
  * <bitnr> may be any valid number (hex, decimal or octal) in the range
  * 0...bits-1; the leading + or - is required. Here are some examples:
  *   +0-15,+32,-128,-0xFF
  *   -0-255,+1-16,+0x128
  *   +1,+2,+3,+4,-5,-7-10
- * Returns a clear and a set bitmask. Every positive value in the string
- * results in a bit set in the set mask and every negative value in the
- * string results in a bit SET in the clear mask. As a bit may be touched
- * more than once, the last 'operation' wins: +0-255,-128 = all but bit
- * 128 set in the set mask, only bit 128 set in the clear mask.
+ * Returns the new bitmap after all changes have been applied. Every
+ * positive value in the string will set a bit and every negative value
+ * in the string will clear a bit. As a bit may be touched more than once,
+ * the last 'operation' wins:
+ * +0-255,-128 = first bits 0-255 will be set, then bit 128 will be
+ * cleared again. All other bits are unmodified.
  */
-static int str2clrsetmasks(const char *str,
-			   unsigned long *clrmap,
-			   unsigned long *setmap,
-			   int bits)
+static int modify_bitmap(const char *str, unsigned long *bitmap, int bits)
 {
 	int a, i, z;
 	char *np, sign;
@@ -922,9 +918,6 @@ static int str2clrsetmasks(const char *str,
 	if (bits & 0x07)
 		return -EINVAL;
 
-	memset(clrmap, 0, bits / 8);
-	memset(setmap, 0, bits / 8);
-
 	while (*str) {
 		sign = *str++;
 		if (sign != '+' && sign != '-')
@@ -940,13 +933,10 @@ static int str2clrsetmasks(const char *str,
 			str = np;
 		}
 		for (i = a; i <= z; i++)
-			if (sign == '+') {
-				set_bit_inv(i, setmap);
-				clear_bit_inv(i, clrmap);
-			} else {
-				clear_bit_inv(i, setmap);
-				set_bit_inv(i, clrmap);
-			}
+			if (sign == '+')
+				set_bit_inv(i, bitmap);
+			else
+				clear_bit_inv(i, bitmap);
 		while (*str == ',' || *str == '\n')
 			str++;
 	}
@@ -970,44 +960,34 @@ static int process_mask_arg(const char *str,
 			    unsigned long *bitmap, int bits,
 			    struct mutex *lock)
 {
-	int i;
+	unsigned long *newmap, size;
+	int rc;
 
 	/* bits needs to be a multiple of 8 */
 	if (bits & 0x07)
 		return -EINVAL;
 
+	size = BITS_TO_LONGS(bits)*sizeof(unsigned long);
+	newmap = kmalloc(size, GFP_KERNEL);
+	if (!newmap)
+		return -ENOMEM;
+	if (mutex_lock_interruptible(lock)) {
+		kfree(newmap);
+		return -ERESTARTSYS;
+	}
+
 	if (*str == '+' || *str == '-') {
-		DECLARE_BITMAP(clrm, bits);
-		DECLARE_BITMAP(setm, bits);
-
-		i = str2clrsetmasks(str, clrm, setm, bits);
-		if (i)
-			return i;
-		if (mutex_lock_interruptible(lock))
-			return -ERESTARTSYS;
-		for (i = 0; i < bits; i++) {
-			if (test_bit_inv(i, clrm))
-				clear_bit_inv(i, bitmap);
-			if (test_bit_inv(i, setm))
-				set_bit_inv(i, bitmap);
-		}
+		memcpy(newmap, bitmap, size);
+		rc = modify_bitmap(str, newmap, bits);
 	} else {
-		DECLARE_BITMAP(setm, bits);
-
-		i = hex2bitmap(str, setm, bits);
-		if (i)
-			return i;
-		if (mutex_lock_interruptible(lock))
-			return -ERESTARTSYS;
-		for (i = 0; i < bits; i++)
-			if (test_bit_inv(i, setm))
-				set_bit_inv(i, bitmap);
-			else
-				clear_bit_inv(i, bitmap);
+		memset(newmap, 0, size);
+		rc = hex2bitmap(str, newmap, bits);
 	}
+	if (rc == 0)
+		memcpy(bitmap, newmap, size);
 	mutex_unlock(lock);
-
-	return 0;
+	kfree(newmap);
+	return rc;
 }
 
 /*
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 49f64eb3eab0..de8282420f96 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -25,6 +25,7 @@
 #include <linux/netdevice.h>
 #include <linux/netdev_features.h>
 #include <linux/skbuff.h>
+#include <linux/vmalloc.h>
 
 #include <net/iucv/af_iucv.h>
 #include <net/dsfield.h>
@@ -4699,7 +4700,7 @@ static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
 
 	priv.buffer_len = oat_data.buffer_len;
 	priv.response_len = 0;
-	priv.buffer =  kzalloc(oat_data.buffer_len, GFP_KERNEL);
+	priv.buffer = vzalloc(oat_data.buffer_len);
 	if (!priv.buffer) {
 		rc = -ENOMEM;
 		goto out;
@@ -4740,7 +4741,7 @@ static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
 			rc = -EFAULT;
 
 out_free:
-	kfree(priv.buffer);
+	vfree(priv.buffer);
 out:
 	return rc;
 }
@@ -5706,6 +5707,8 @@ static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
 		dev->priv_flags &= ~IFF_TX_SKB_SHARING;
 		dev->hw_features |= NETIF_F_SG;
 		dev->vlan_features |= NETIF_F_SG;
+		if (IS_IQD(card))
+			dev->features |= NETIF_F_SG;
 	}
 
 	return dev;
@@ -5768,8 +5771,10 @@ static int qeth_core_probe_device(struct ccwgroup_device *gdev)
 	qeth_update_from_chp_desc(card);
 
 	card->dev = qeth_alloc_netdev(card);
-	if (!card->dev)
+	if (!card->dev) {
+		rc = -ENOMEM;
 		goto err_card;
+	}
 
 	qeth_determine_capabilities(card);
 	enforced_disc = qeth_enforce_discipline(card);
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 710fa74892ae..b5e38531733f 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -423,7 +423,7 @@ static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 		default:
 			dev_kfree_skb_any(skb);
 			QETH_CARD_TEXT(card, 3, "inbunkno");
-			QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
+			QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
 			continue;
 		}
 		work_done++;
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 7175086677fb..ada258c01a08 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1390,7 +1390,7 @@ static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
 		default:
 			dev_kfree_skb_any(skb);
 			QETH_CARD_TEXT(card, 3, "inbunkno");
-			QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
+			QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
 			continue;
 		}
 		work_done++;