dmaengine: idxd: move out percpu_ref_exit() to ensure it's outside submission

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percpu_ref_tryget_live() is safe to call as long as ref is between init and
exit according to the function comment. Move percpu_ref_exit() so it is
called after the dma channel is no longer valid to ensure this holds true.

Fixes: 93a40a6d74 ("dmaengine: idxd: add percpu_ref to descriptor submission path")
Suggested-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/163294293832.914350.10326422026738506152.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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Dave Jiang 2021-09-29 12:15:38 -07:00 • committed by Vinod Koul

parent ae8f13f0a6

commit 85f604af9c

2 changed files with 2 additions and 1 deletions

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drivers/dma/idxd/device.c

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2

drivers/dma/idxd/dma.c

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