From: Umesh Nerlige Ramappa umesh.nerlige.ramappa@intel.com
[ Upstream commit 98c9d27ab30aa9c6451d3a34e6e297171f273e51 ]
In polled mode, user calls poll() for read data to be available before performing a read(). In the duration between these 2 calls, there may be new data available in the OA buffer. To ensure user reads all available data, check for latest data in the OA buffer in polled read.
Signed-off-by: Umesh Nerlige Ramappa umesh.nerlige.ramappa@intel.com Reviewed-by: Ashutosh Dixit ashutosh.dixit@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20250212010255.1423343-1-umesh... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/xe/xe_oa.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/xe/xe_oa.c b/drivers/gpu/drm/xe/xe_oa.c index eb6cd91e1e226..abf37d9ab2212 100644 --- a/drivers/gpu/drm/xe/xe_oa.c +++ b/drivers/gpu/drm/xe/xe_oa.c @@ -548,6 +548,7 @@ static ssize_t xe_oa_read(struct file *file, char __user *buf, mutex_unlock(&stream->stream_lock); } while (!offset && !ret); } else { + xe_oa_buffer_check_unlocked(stream); mutex_lock(&stream->stream_lock); ret = __xe_oa_read(stream, buf, count, &offset); mutex_unlock(&stream->stream_lock);