Patch "drm/i915: Fix CSR MMIO address check" has been added to the 4.2-stable tree

Patch "drm/i915: Fix CSR MMIO address check" has been added to the 4.2-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/i915: Fix CSR MMIO address check

to the 4.2-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-i915-fix-csr-mmio-address-check.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 982b0b2dd590c00f089fc6fe915bd0cb302a7f5c Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 9 Sep 2015 16:52:09 +0200
Subject: drm/i915: Fix CSR MMIO address check
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Takashi Iwai <tiwai@suse.de>

commit 982b0b2dd590c00f089fc6fe915bd0cb302a7f5c upstream.

Fix a wrong logical AND (&&) used for the range check of CSR MMIO.

Spotted nicely by gcc -Wlogical-op flag:
  drivers/gpu/drm/i915/intel_csr.c: In function ‘finish_csr_load’:
  drivers/gpu/drm/i915/intel_csr.c:353:41: warning: logical ‘and’ of mutually exclusive tests is always false [-Wlogical-op]

Fixes: eb805623d8b1 ('drm/i915/skl: Add support to load SKL CSR firmware.')
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/i915/intel_csr.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/intel_csr.c
+++ b/drivers/gpu/drm/i915/intel_csr.c
@@ -350,7 +350,7 @@ static void finish_csr_load(const struct
 	}
 	csr->mmio_count = dmc_header->mmio_count;
 	for (i = 0; i < dmc_header->mmio_count; i++) {
-		if (dmc_header->mmioaddr[i] < CSR_MMIO_START_RANGE &&
+		if (dmc_header->mmioaddr[i] < CSR_MMIO_START_RANGE ||
 			dmc_header->mmioaddr[i] > CSR_MMIO_END_RANGE) {
 			DRM_ERROR(" Firmware has wrong mmio address 0x%x\n",
 						dmc_header->mmioaddr[i]);


Patches currently in stable-queue which might be from tiwai@suse.de are

queue-4.2/drm-i915-fix-csr-mmio-address-check.patch