From: Ashutosh Dixit Date: Fri, 13 Mar 2026 05:36:30 +0000 (-0700) Subject: drm/xe/oa: Allow reading after disabling OA stream X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=4ff57c5e8dbba23b5457be12f9709d5c016da16e;p=thirdparty%2Flinux.git drm/xe/oa: Allow reading after disabling OA stream Some OA data might be present in the OA buffer when OA stream is disabled. Allow UMD's to retrieve this data, so that all data till the point when OA stream is disabled can be retrieved. v2: Update tail pointer after disable (Umesh) Fixes: efb315d0a013 ("drm/xe/oa/uapi: Read file_operation") Cc: stable@vger.kernel.org Signed-off-by: Ashutosh Dixit Reviewed-by: Umesh Nerlige Ramappa Link: https://patch.msgid.link/20260313053630.3176100-1-ashutosh.dixit@intel.com --- diff --git a/drivers/gpu/drm/xe/xe_oa.c b/drivers/gpu/drm/xe/xe_oa.c index dcd393b0931a2..2efc16c3a95df 100644 --- a/drivers/gpu/drm/xe/xe_oa.c +++ b/drivers/gpu/drm/xe/xe_oa.c @@ -543,8 +543,7 @@ static ssize_t xe_oa_read(struct file *file, char __user *buf, size_t offset = 0; int ret; - /* Can't read from disabled streams */ - if (!stream->enabled || !stream->sample) + if (!stream->sample) return -EINVAL; if (!(file->f_flags & O_NONBLOCK)) { @@ -1456,6 +1455,10 @@ static void xe_oa_stream_disable(struct xe_oa_stream *stream) if (stream->sample) hrtimer_cancel(&stream->poll_check_timer); + + /* Update stream->oa_buffer.tail to allow any final reports to be read */ + if (xe_oa_buffer_check_unlocked(stream)) + wake_up(&stream->poll_wq); } static int xe_oa_enable_preempt_timeslice(struct xe_oa_stream *stream)