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drm/xe/oa: Allow reading after disabling OA stream

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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: efb315d0a0 ("drm/xe/oa/uapi: Read file_operation")
Cc: stable@vger.kernel.org
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Umesh Nerlige Ramappa<umesh.nerlige.ramappa@intel.com>
Link: https://patch.msgid.link/20260313053630.3176100-1-ashutosh.dixit@intel.com
(cherry picked from commit 4ff57c5e8d)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
This commit is contained in:
Ashutosh Dixit 2026-03-12 22:36:30 -07:00 committed by Thomas Hellström
parent 38b8dcde23
commit 9be6fd9fbd
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/xe/xe_oa.c
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@ -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)) {
@ -1460,6 +1459,10 @@ 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)