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| author | Sean Anderson <sean.anderson@linux.dev> | 2024-03-08 16:00:34 -0500 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2024-04-07 17:08:19 +0530 |
| commit | ec177e46451597ac9d2e371e216afca9535ee547 (patch) | |
| tree | b2351baec4386fca9de2a3dc113dcc127d3604dd /drivers/dma | |
| parent | 28ccf02caa199e02a6fbf605496bfb9ee73f872c (diff) | |
| download | linux-stable-ec177e46451597ac9d2e371e216afca9535ee547.tar.gz linux-stable-ec177e46451597ac9d2e371e216afca9535ee547.tar.bz2 linux-stable-ec177e46451597ac9d2e371e216afca9535ee547.zip | |
dma: Add lockdep asserts to virt-dma
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>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/virt-dma.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h index e9f5250fbe4d..59d9eabc8b67 100644 --- a/drivers/dma/virt-dma.h +++ b/drivers/dma/virt-dma.h @@ -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); |