Commit 81c2f79c authored by Dave Jiang's avatar Dave Jiang Committed by Vinod Koul
Browse files

dmaengine: idxd: add capability check for 'block on fault' attribute 



The device general capability has a bit that indicate whether 'block on
fault' is supported. Add check to wq sysfs knob to check if cap exists
before allowing user to toggle.

Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162802992615.3084999.12539468940404102898.stgit@djiang5-desk3.ch.intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 4153a7f6

drivers/dma/idxd/sysfs.c

+3 −0
Original line number Diff line number Diff line
@@ -642,6 +642,9 @@ static ssize_t wq_block_on_fault_store(struct device *dev, 
	bool bof;

	int rc;



	if (!idxd->hw.gen_cap.block_on_fault)

		return -EOPNOTSUPP;



	if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))

		return -EPERM;