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dmaengine: virt-dma: Add missing locking around list operations 

All list operations are protected by &vc->lock. As vchan_vdesc_fini()
is called unlocked add the missing locking around the list operations.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20191216105328.15198-6-s.hauer@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Sascha Hauer 2019-12-16 11:53:24 +01:00 committed by Vinod Koul
parent f882101122
commit 9f91e6bfa8
1 changed files with 7 additions and 2 deletions
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9
drivers/dma/virt-dma.h
View File

@ -113,10 +113,15 @@ static inline void vchan_vdesc_fini(struct virt_dma_desc *vd)
{
struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
if (dmaengine_desc_test_reuse(&vd->tx))
if (dmaengine_desc_test_reuse(&vd->tx)) {
unsigned long flags;
spin_lock_irqsave(&vc->lock, flags);
list_add(&vd->node, &vc->desc_allocated);
else
spin_unlock_irqrestore(&vc->lock, flags);
} else {
vc->desc_free(vd);
}
}
/**