From: Fenghua Yu fenghua.yu@intel.com
commit 863676fe1ac1b82fc9eb56c242e80acfbfc18b76 upstream.
Disabling IDXD device doesn't reset Page Request Service (PRS) disable flag to its initial value 0. This may cause user confusion because once PRS is disabled user will see PRS still remains the previous setting (i.e. disabled) via sysfs interface even after the device is disabled.
To eliminate user confusion, reset PRS disable flag to ensure that the PRS flag bit reflects correct state after the device is disabled.
Additionally, simplify the code by setting wq->flags to 0, which clears all flag bits, including any future additions.
Fixes: f2dc327131b5 ("dmaengine: idxd: add per wq PRS disable") Tested-by: Tony Zhu tony.zhu@intel.com Signed-off-by: Fenghua Yu fenghua.yu@intel.com Reviewed-by: Dave Jiang dave.jiang@intel.com Link: https://lore.kernel.org/r/20230712193505.3440752-1-fenghua.yu@intel.com Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/dma/idxd/device.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c index 5abbcc61c528..9a15f0d12c79 100644 --- a/drivers/dma/idxd/device.c +++ b/drivers/dma/idxd/device.c @@ -384,9 +384,7 @@ static void idxd_wq_disable_cleanup(struct idxd_wq *wq) wq->threshold = 0; wq->priority = 0; wq->enqcmds_retries = IDXD_ENQCMDS_RETRIES; - clear_bit(WQ_FLAG_DEDICATED, &wq->flags); - clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); - clear_bit(WQ_FLAG_ATS_DISABLE, &wq->flags); + wq->flags = 0; memset(wq->name, 0, WQ_NAME_SIZE); wq->max_xfer_bytes = WQ_DEFAULT_MAX_XFER; idxd_wq_set_max_batch_size(idxd->data->type, wq, WQ_DEFAULT_MAX_BATCH);