[PATCH 5.13 012/175] dmaengine: idxd: fix desc->vector that isnt being updated
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-08-10 17:53:08
Also in:
lkml
Subsystem:
dma generic offload engine subsystem, intel idxd driver, the rest · Maintainers:
Vinod Koul, Vinicius Costa Gomes, Linus Torvalds
From: Dave Jiang <dave.jiang@intel.com>
[ Upstream commit 8ba89a3c7967808f33478a8573277cf6a7412c4c ]
Missing update for desc->vector when the wq vector gets updated. This
causes the desc->vector to always be at 0.
Fixes: da435aedb00a ("dmaengine: idxd: fix array index when int_handles are being used")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162628784374.353761.4736602409627820431.stgit@djiang5-desk3.ch.intel.com (local)
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/dma/idxd/submit.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/dma/idxd/submit.c b/drivers/dma/idxd/submit.c
index e29887528077..21d7d09f73dd 100644
--- a/drivers/dma/idxd/submit.c
+++ b/drivers/dma/idxd/submit.c@@ -25,11 +25,10 @@ static struct idxd_desc *__get_desc(struct idxd_wq *wq, int idx, int cpu) * Descriptor completion vectors are 1...N for MSIX. We will round * robin through the N vectors. */ - wq->vec_ptr = (wq->vec_ptr % idxd->num_wq_irqs) + 1; + wq->vec_ptr = desc->vector = (wq->vec_ptr % idxd->num_wq_irqs) + 1; if (!idxd->int_handles) { desc->hw->int_handle = wq->vec_ptr; } else { - desc->vector = wq->vec_ptr; /* * int_handles are only for descriptor completion. However for device * MSIX enumeration, vec 0 is used for misc interrupts. Therefore even
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2.30.2