From: Umesh Nerlige Ramappa Date: Wed, 12 Feb 2025 01:02:55 +0000 (-0800) Subject: drm/xe/oa: Ensure that polled read returns latest data X-Git-Tag: v6.15-rc1~120^2~15^2~1 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=98c9d27ab30aa9c6451d3a34e6e297171f273e51;p=thirdparty%2Fkernel%2Flinux.git drm/xe/oa: Ensure that polled read returns latest data 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 Reviewed-by: Ashutosh Dixit Link: https://patchwork.freedesktop.org/patch/msgid/20250212010255.1423343-1-umesh.nerlige.ramappa@intel.com --- diff --git a/drivers/gpu/drm/xe/xe_oa.c b/drivers/gpu/drm/xe/xe_oa.c index d89e6cabf5a56..2c5a24a13e87a 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);