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| author | Dave Jiang <dave.jiang@intel.com> | 2022-04-11 15:08:55 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-27 13:53:51 +0200 |
| commit | 9a3c026dc3a59fa23c63d90752f07538a3c75646 (patch) | |
| tree | c48a1fdeac7eab5b26ae6e89f8043baad373dde0 /drivers | |
| parent | f593f49fcd174ebe0ebeebecf46fadc134593ddb (diff) | |
| download | linux-9a3c026dc3a59fa23c63d90752f07538a3c75646.tar.gz linux-9a3c026dc3a59fa23c63d90752f07538a3c75646.tar.bz2 linux-9a3c026dc3a59fa23c63d90752f07538a3c75646.zip | |
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 7b41cdff1a2c..5bf4b4be64e4 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -1132,6 +1132,9 @@ 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; |