[PATCH] drm/ttm: Fix address passed to dma_mapping_error() in ttm_pool_map()

From: Jeremy Cline
Date: Mon Jan 11 2021 - 11:42:16 EST


check_unmap() is producing a warning about a missing map error check.
The return value from dma_map_page() should be checked for an error, not
the caller-provided dma_addr.

Fixes: d099fc8f540a ("drm/ttm: new TT backend allocation pool v3")
Signed-off-by: Jeremy Cline <jcline@xxxxxxxxxx>
---
drivers/gpu/drm/ttm/ttm_pool.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c
index 7b2f60616750..0aa197204b08 100644
--- a/drivers/gpu/drm/ttm/ttm_pool.c
+++ b/drivers/gpu/drm/ttm/ttm_pool.c
@@ -190,7 +190,7 @@ static int ttm_pool_map(struct ttm_pool *pool, unsigned int order,
size_t size = (1ULL << order) * PAGE_SIZE;

addr = dma_map_page(pool->dev, p, 0, size, DMA_BIDIRECTIONAL);
- if (dma_mapping_error(pool->dev, **dma_addr))
+ if (dma_mapping_error(pool->dev, addr))
return -EFAULT;
}

--
2.29.2