This is a note to let you know that I've just added the patch titled
nouveau: fix nv40_perfctr_next() cleanup regression
to the 4.4-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:
nouveau-fix-nv40_perfctr_next-cleanup-regression.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 86d65b7e7a0c927d07d18605c276d0f142438ead Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Mon, 14 Mar 2016 15:24:10 +0100
Subject: nouveau: fix nv40_perfctr_next() cleanup regression
From: Arnd Bergmann <arnd@xxxxxxxx>
commit 86d65b7e7a0c927d07d18605c276d0f142438ead upstream.
gcc-6 warns about code in the nouveau driver that is obviously silly:
drivers/gpu/drm/nouveau/nvkm/engine/pm/nv40.c: In function 'nv40_perfctr_next':
drivers/gpu/drm/nouveau/nvkm/engine/pm/nv40.c:62:19: warning: self-comparison always evaluats to false [-Wtautological-compare]
if (pm->sequence != pm->sequence) {
The behavior was accidentally introduced in a patch described as "This is
purely preparation for upcoming commits, there should be no code changes here.".
As far as I can tell, that was true for the rest of that patch except for
this one function, which has been changed to a NOP.
This patch restores the original behavior.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Fixes: 8c1aeaa13954 ("drm/nouveau/pm: cosmetic changes")
Reviewed-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/nouveau/nvkm/engine/pm/nv40.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/pm/nv40.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/pm/nv40.c
@@ -59,9 +59,11 @@ static void
nv40_perfctr_next(struct nvkm_pm *pm, struct nvkm_perfdom *dom)
{
struct nvkm_device *device = pm->engine.subdev.device;
- if (pm->sequence != pm->sequence) {
+ struct nv40_pm *nv40pm = container_of(pm, struct nv40_pm, base);
+
+ if (nv40pm->sequence != pm->sequence) {
nvkm_wr32(device, 0x400084, 0x00000020);
- pm->sequence = pm->sequence;
+ nv40pm->sequence = pm->sequence;
}
}
Patches currently in stable-queue which might be from arnd@xxxxxxxx are
queue-4.4/include-linux-kernel.h-change-abs-macro-so-it-uses-consistent-return-type.patch
queue-4.4/ath9k-fix-misleading-indentation.patch
queue-4.4/iwlegacy-avoid-warning-about-missing-braces.patch
queue-4.4/kbuild-disable-maybe-uninitialized-warning-for-config_profile_all_branches.patch
queue-4.4/net-caif-fix-misleading-indentation.patch
queue-4.4/nouveau-fix-nv40_perfctr_next-cleanup-regression.patch
queue-4.4/gcov-disable-wmaybe-uninitialized-warning.patch
queue-4.4/am437x-vfpe-fix-typo-in-vpfe_get_app_input_index.patch
queue-4.4/fix-build-warning-in-kernel-cpuset.c.patch
queue-4.4/reiserfs-fix-new_insert_key-may-be-used-uninitialized.patch
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