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| author | Dave Jiang <dave.jiang@intel.com> | 2022-04-12 01:08:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-27 15:38:54 +0300 |
| commit | 6c30e099b978856620054918217b4ff339d85029 (patch) | |
| tree | b23479b315c14493d8f86a97d0b66262d6fe52a2 /drivers | |
| parent | e83acf93919b93d11c5181b20be35713bfe2b84c (diff) | |
| download | linux-6c30e099b978856620054918217b4ff339d85029.tar.xz | |
dmaengine: idxd: add RO check for wq max_batch_size write
[ Upstream commit 66903461ffed0b66fc3e0200082d4e09365aacdc ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -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 999ce13a93ad..f7ab5c077a2b 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -876,6 +876,9 @@ 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; |