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| Started by | Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
|---|---|
| First post | 2017-05-23 23:00 +0200 |
| Last post | 2017-05-23 23:00 +0200 |
| Articles | 1 — 1 participant |
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[PATCH 4.4 032/103] drm/nouveau/tmr: ack interrupt before processing alarms Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
| From | Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
|---|---|
| Date | 2017-05-23 23:00 +0200 |
| Subject | [PATCH 4.4 032/103] drm/nouveau/tmr: ack interrupt before processing alarms |
| Message-ID | <tKp4m-7w-9@gated-at.bofh.it> |
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ben Skeggs <bskeggs@redhat.com>
commit 3733bd8b407211739e72d051e5f30ad82a52c4bc upstream.
Fixes a race where we can miss an alarm that triggers while we're already
processing previous alarms.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/nouveau/nvkm/subdev/timer/nv04.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/timer/nv04.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/timer/nv04.c
@@ -76,8 +76,8 @@ nv04_timer_intr(struct nvkm_timer *tmr)
u32 stat = nvkm_rd32(device, NV04_PTIMER_INTR_0);
if (stat & 0x00000001) {
- nvkm_timer_alarm_trigger(tmr);
nvkm_wr32(device, NV04_PTIMER_INTR_0, 0x00000001);
+ nvkm_timer_alarm_trigger(tmr);
stat &= ~0x00000001;
}
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