On 11-04-22, 15:08, Dave Jiang wrote:
> Block wq_max_batch_size_store() when the device is configured as read-only
> and not configurable.
Applied, thanks
>
> Fixes: e7184b159dd3 ("dmaengine: idxd: add support for configurable max wq batch size")
> Reported-by: Bernice Zhang <bernice.zhang@xxxxxxxxx>
> Tested-by: Bernice Zhang <bernice.zhang@xxxxxxxxx>
> Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
> ---
> drivers/dma/idxd/sysfs.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
> index ec13ca4808f9..dfd549685c46 100644
> --- a/drivers/dma/idxd/sysfs.c
> +++ b/drivers/dma/idxd/sysfs.c
> @@ -942,6 +942,9 @@ static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribu
> u64 batch_size;
> int rc;
>
> + if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
> + return -EPERM;
> +
> if (wq->state != IDXD_WQ_DISABLED)
> return -EPERM;
>
>
--
~Vinod
