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| author |   Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com> | 2025-02-11 17:02:55 -0800 |
|---|---|---|
| committer | Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com> | 2025-02-21 11:45:29 -0800 |
| commit | 98c9d27ab30aa9c6451d3a34e6e297171f273e51 (patch) | |
| tree | cd23fd9273af54e809bbea75624437a4bcfb204b | |
| parent | drm/xe: Add fault injection for xe_sync_entry_parse (diff) | |
| download | wireguard-linux-98c9d27ab30aa9c6451d3a34e6e297171f273e51.tar.xz wireguard-linux-98c9d27ab30aa9c6451d3a34e6e297171f273e51.zip | |
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 <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250212010255.1423343-1-umesh.nerlige.ramappa@intel.com
| -rw-r--r-- | drivers/gpu/drm/xe/xe_oa.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_oa.c b/drivers/gpu/drm/xe/xe_oa.c index d89e6cabf5a5..2c5a24a13e87 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); |