diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 6 |
2 files changed, 10 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 9e5e3ca722cd..6c25c8520c87 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -4176,6 +4176,11 @@ static inline unsigned long msecs_to_jiffies_timeout(const unsigned int m) static inline unsigned long nsecs_to_jiffies_timeout(const u64 n) { + /* nsecs_to_jiffies64() does not guard against overflow */ + if (NSEC_PER_SEC % HZ && + div_u64(n, NSEC_PER_SEC) >= MAX_JIFFY_OFFSET / HZ) + return MAX_JIFFY_OFFSET; + return min_t(u64, MAX_JIFFY_OFFSET, nsecs_to_jiffies64(n) + 1); } diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 887fff281f4e..5a3f3bb3f21d 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -3286,7 +3286,7 @@ static unsigned long to_wait_timeout(s64 timeout_ns) * -ERESTARTSYS: signal interrupted the wait * -ENONENT: object doesn't exist * Also possible, but rare: - * -EAGAIN: GPU wedged + * -EAGAIN: incomplete, restart syscall * -ENOMEM: damn * -ENODEV: Internal IRQ fail * -E?: The add request failed @@ -3334,6 +3334,10 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file) */ if (ret == -ETIME && !nsecs_to_jiffies(args->timeout_ns)) args->timeout_ns = 0; + + /* Asked to wait beyond the jiffie/scheduler precision? */ + if (ret == -ETIME && args->timeout_ns) + ret = -EAGAIN; } i915_gem_object_put(obj); |
