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| author | Dave Jiang <dave.jiang@intel.com> | 2022-04-11 15:08:01 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2022-04-20 17:24:42 +0530 |
| commit | 505a2d1032ae656b0a8c736be110255503941cde (patch) | |
| tree | c921365597164e694de3a46985153bf2603250b7 /drivers/dma/idxd | |
| parent | 66903461ffed0b66fc3e0200082d4e09365aacdc (diff) | |
| download | linux-505a2d1032ae656b0a8c736be110255503941cde.tar.gz linux-505a2d1032ae656b0a8c736be110255503941cde.tar.bz2 linux-505a2d1032ae656b0a8c736be110255503941cde.zip | |
dmaengine: idxd: add RO check for wq max_transfer_size write
Block wq_max_transfer_size_store() when the device is configured as
read-only and not configurable.
Fixes: d7aad5550eca ("dmaengine: idxd: add support for configurable max wq xfer 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/164971488154.2200913.10706665404118545941.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/idxd')
| -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 6c41d429bd89..dfd549685c46 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -905,6 +905,9 @@ static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attr u64 xfer_size; int rc; + if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) + return -EPERM; + if (wq->state != IDXD_WQ_DISABLED) return -EPERM; |