Merge branch 'drm-intel-next' of git://people.freedesktop.org/~danvet/drm-intel into drm-next

drm-intel-next-2014-01-10:
- final bits for runtime D3 on Haswell from Paul (now enabled fully)
- parse the backlight modulation freq information in the VBT from Jani
  (but not yet used)
- more watermark improvements from Ville for ilk-ivb and bdw
- bugfixes for fastboot from Jesse
- watermark fix for i830M (but not yet everything)
- vlv vga hotplug w/a (Imre)
- piles of other small improvements, cleanups and fixes all over

Note that the pull request includes a backmerge of the last drm-fixes
pulled into Linus' tree - things where getting a bit too messy. So the
shortlog also contains a bunch of patches from Linus tree. Please yell if
you want me to frob it for you a bit.

* 'drm-intel-next' of git://people.freedesktop.org/~danvet/drm-intel: (609 commits)
  drm/i915/bdw: make sure south port interrupts are enabled properly v2
  drm/i915: Include more information in disabled hotplug interrupt warning
  drm/i915: Only complain about a rogue hotplug IRQ after disabling
  drm/i915: Only WARN about a stuck hotplug irq ONCE
  drm/i915: s/hotplugt_status_gen4/hotplug_status_g4x/

1 files changed, 16 insertions, 11 deletions

diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index 34386943ebc..08219fb3338 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -668,25 +668,30 @@ static ssize_t ib_uverbs_write(struct file *filp, const char __user *buf,
 		if ((hdr.in_words + ex_hdr.provider_in_words) * 8 != count)
 			return -EINVAL;
 
+		if (ex_hdr.cmd_hdr_reserved)
+			return -EINVAL;
+
 		if (ex_hdr.response) {
 			if (!hdr.out_words && !ex_hdr.provider_out_words)
 				return -EINVAL;
+
+			if (!access_ok(VERIFY_WRITE,
+				       (void __user *) (unsigned long) ex_hdr.response,
+				       (hdr.out_words + ex_hdr.provider_out_words) * 8))
+				return -EFAULT;
 		} else {
 			if (hdr.out_words || ex_hdr.provider_out_words)
 				return -EINVAL;
 		}
 
-		INIT_UDATA(&ucore,
-			   (hdr.in_words) ? buf : 0,
-			   (unsigned long)ex_hdr.response,
-			   hdr.in_words * 8,
-			   hdr.out_words * 8);
-
-		INIT_UDATA(&uhw,
-			   (ex_hdr.provider_in_words) ? buf + ucore.inlen : 0,
-			   (ex_hdr.provider_out_words) ? (unsigned long)ex_hdr.response + ucore.outlen : 0,
-			   ex_hdr.provider_in_words * 8,
-			   ex_hdr.provider_out_words * 8);
+		INIT_UDATA_BUF_OR_NULL(&ucore, buf, (unsigned long) ex_hdr.response,
+				       hdr.in_words * 8, hdr.out_words * 8);
+
+		INIT_UDATA_BUF_OR_NULL(&uhw,
+				       buf + ucore.inlen,
+				       (unsigned long) ex_hdr.response + ucore.outlen,
+				       ex_hdr.provider_in_words * 8,
+				       ex_hdr.provider_out_words * 8);
 
 		err = uverbs_ex_cmd_table[command](file,
 						   &ucore,