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dma: Add lockdep asserts to virt-dma

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Add lockdep asserts to all functions with "vc.lock must be held by
caller" in their documentation. This will help catch cases where these
assumptions do not hold.

Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://lore.kernel.org/r/20240308210034.3634938-4-sean.anderson@linux.dev
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Sean Anderson 2024-03-08 16:00:34 -05:00 committed by Vinod Koul
parent 28ccf02caa
commit ec177e4645
1 changed files with 10 additions and 0 deletions
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10
drivers/dma/virt-dma.h
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@ -81,6 +81,8 @@ static inline struct dma_async_tx_descriptor *vchan_tx_prep(struct virt_dma_chan
*/
static inline bool vchan_issue_pending(struct virt_dma_chan *vc)
{
lockdep_assert_held(&vc->lock);
list_splice_tail_init(&vc->desc_submitted, &vc->desc_issued);
return !list_empty(&vc->desc_issued);
}
@ -96,6 +98,8 @@ static inline void vchan_cookie_complete(struct virt_dma_desc *vd)
struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
dma_cookie_t cookie;
lockdep_assert_held(&vc->lock);
cookie = vd->tx.cookie;
dma_cookie_complete(&vd->tx);
dev_vdbg(vc->chan.device->dev, "txd %p[%x]: marked complete\n",
@ -146,6 +150,8 @@ static inline void vchan_terminate_vdesc(struct virt_dma_desc *vd)
{
struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
lockdep_assert_held(&vc->lock);
list_add_tail(&vd->node, &vc->desc_terminated);
if (vc->cyclic == vd)
@ -160,6 +166,8 @@ static inline void vchan_terminate_vdesc(struct virt_dma_desc *vd)
*/
static inline struct virt_dma_desc *vchan_next_desc(struct virt_dma_chan *vc)
{
lockdep_assert_held(&vc->lock);
return list_first_entry_or_null(&vc->desc_issued,
struct virt_dma_desc, node);
}
@ -177,6 +185,8 @@ static inline struct virt_dma_desc *vchan_next_desc(struct virt_dma_chan *vc)
static inline void vchan_get_all_descriptors(struct virt_dma_chan *vc,
struct list_head *head)
{
lockdep_assert_held(&vc->lock);
list_splice_tail_init(&vc->desc_allocated, head);
list_splice_tail_init(&vc->desc_submitted, head);
list_splice_tail_init(&vc->desc_issued, head);