diff options
| author | Fenghua Yu <fenghua.yu@intel.com> | 2023-08-11 04:26:34 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2023-08-21 16:26:30 +0300 |
| commit | 0056a7f07b0a63e6cee815a789eabba6f3a710f0 (patch) | |
| tree | 991655df504838de9faf748a9a8f3c6c58efaaba /drivers/dma/idxd | |
| parent | 84b798fedf3fa8f0ab0c096593ba817abc454fe5 (diff) | |
| download | linux-0056a7f07b0a63e6cee815a789eabba6f3a710f0.tar.xz | |
dmaengine: idxd: Allow ATS disable update only for configurable devices
ATS disable status in a WQ is read-only if the device is not configurable.
This change ensures that the ATS disable attribute can be modified via
sysfs only on configurable devices.
Fixes: 92de5fa2dc39 ("dmaengine: idxd: add ATS disable knob for work queues")
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20230811012635.535413-1-fenghua.yu@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/idxd')
| -rw-r--r-- | drivers/dma/idxd/sysfs.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index d16c16445c4f..66c89b07b3f7 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -1088,12 +1088,16 @@ static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute const char *buf, size_t count) { struct idxd_wq *wq = confdev_to_wq(dev); + struct idxd_device *idxd = wq->idxd; bool ats_dis; int rc; if (wq->state != IDXD_WQ_DISABLED) return -EPERM; + if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) + return -EPERM; + rc = kstrtobool(buf, &ats_dis); if (rc < 0) return rc; |