diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2016-03-14 15:24:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-30 10:18:36 +0200 |
| commit | e3718ed1df970f743f9f20cb4234dd56ed6f18da (patch) | |
| tree | 77bcc225286f600f717ec8c1fea72c93e9d1c530 | |
| parent | 2c4e9913a114c01991dc3ae455a1d126e440251e (diff) | |
nouveau: fix nv40_perfctr_next() cleanup regression
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@arndb.de>
Fixes: 8c1aeaa13954 ("drm/nouveau/pm: cosmetic changes")
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/pm/nv40.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/pm/nv40.c b/drivers/gpu/drm/nouveau/nvkm/engine/pm/nv40.c index 4bef72a9d106..3fda594700e0 100644 --- 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; } } |