From 8cae66574398326134a41513b419e00ad4e380ca Mon Sep 17 00:00:00 2001 From: Fenghua Yu Date: Thu, 10 Aug 2023 18:26:35 -0700 Subject: dmaengine: idxd: Fix issues with PRS disable sysfs knob There are two issues in the current PRS disable sysfs store function wq_prs_disable_store(): 1. Since PRS disable knob is invisible if PRS disable is not supported in WQ, it's redundant to check PRS support again in the store function again. Remove the redundant PRS support check. 2. Since PRS disable is read-only when the device is not configurable, PRS disable cannot be changed on the device. Add device configurable check in the store function. Fixes: f2dc327131b5 ("dmaengine: idxd: add per wq PRS disable") Signed-off-by: Fenghua Yu Reviewed-by: Dave Jiang Link: https://lore.kernel.org/r/20230811012635.535413-2-fenghua.yu@intel.com Signed-off-by: Vinod Koul --- drivers/dma/idxd/sysfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/dma/idxd') diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index 66c89b07b3f7..a5c3eb434832 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -1131,8 +1131,8 @@ static ssize_t wq_prs_disable_store(struct device *dev, struct device_attribute if (wq->state != IDXD_WQ_DISABLED) return -EPERM; - if (!idxd->hw.wq_cap.wq_prs_support) - return -EOPNOTSUPP; + if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) + return -EPERM; rc = kstrtobool(buf, &prs_dis); if (rc < 0) -- cgit v1.2.3