Commit 01086b97 authored by Bart Van Assche's avatar Bart Van Assche Committed by Christian König
Browse files

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: default avatarBart Van Assche <bvanassche@acm.org>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20260227165501.2062829-1-bvanassche@acm.org
parent 0dd7a23d

drivers/dma-buf/dma-resv.c

+4 −1
Original line number Diff line number Diff line
@@ -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);