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| author | Bart Van Assche <bvanassche@acm.org> | 2026-02-27 19:55:01 +0300 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2026-03-03 10:39:13 +0300 |
| commit | 01086b97dcc92799bd03cd243ed6061fd21db7a6 (patch) | |
| tree | d6d0326f4c0cd563997e439f612d745fb43a9833 | |
| parent | 0dd7a23da214279cfb77b0eb03c38614867524d7 (diff) | |
| download | linux-01086b97dcc92799bd03cd243ed6061fd21db7a6.tar.xz | |
dma-buf: Suppress a thread-safety complaint
Handle all possible dma_resv_lock() return values. This patch prepares
for enabling compile-time thread-safety analysis. This will cause the
compiler to check whether all dma_resv_lock() return values are handled.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20260227165501.2062829-1-bvanassche@acm.org
| -rw-r--r-- | drivers/dma-buf/dma-resv.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c index bea3e9858aca..ce9e6c04897f 100644 --- a/drivers/dma-buf/dma-resv.c +++ b/drivers/dma-buf/dma-resv.c @@ -790,8 +790,11 @@ static int __init dma_resv_lockdep(void) mmap_read_lock(mm); ww_acquire_init(&ctx, &reservation_ww_class); ret = dma_resv_lock(&obj, &ctx); - if (ret == -EDEADLK) + if (ret) { + /* Only EDEADLK from the error injection is possible here */ + WARN_ON(ret != -EDEADLK); dma_resv_lock_slow(&obj, &ctx); + } fs_reclaim_acquire(GFP_KERNEL); /* for unmap_mapping_range on trylocked buffer objects in shrinkers */ i_mmap_lock_write(&mapping); |