diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2022-04-12 01:08:55 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2022-04-20 14:54:42 +0300 |
| commit | 66903461ffed0b66fc3e0200082d4e09365aacdc (patch) | |
| tree | 2d59a74da11d82cc161aa3aae9c4cdfc026811fe /drivers/dma | |
| parent | bc3452cdfc468a65965d0ac397c940acb787ea4d (diff) | |
| download | linux-66903461ffed0b66fc3e0200082d4e09365aacdc.tar.xz | |
dmaengine: idxd: add RO check for wq max_batch_size write
Block wq_max_batch_size_store() when the device is configured as read-only
and not configurable.
Fixes: e7184b159dd3 ("dmaengine: idxd: add support for configurable max wq batch size")
Reported-by: Bernice Zhang <bernice.zhang@intel.com>
Tested-by: Bernice Zhang <bernice.zhang@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/164971493551.2201159.1942042593642155209.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/idxd/sysfs.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 7e19ab92b61a..6c41d429bd89 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -939,6 +939,9 @@ 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; |