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Diffstat (limited to 'lib')
-rw-r--r--lib/swiotlb.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 6583f3512386..125c1062119f 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -586,7 +586,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,
not_found:
spin_unlock_irqrestore(&io_tlb_lock, flags);
- if (printk_ratelimit())
+ if (!(attrs & DMA_ATTR_NO_WARN) && printk_ratelimit())
dev_warn(hwdev, "swiotlb buffer is full (sz: %zd bytes)\n", size);
return SWIOTLB_MAP_ERROR;
found:
@@ -713,6 +713,7 @@ void *
swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags)
{
+ bool warn = !(flags & __GFP_NOWARN);
dma_addr_t dev_addr;
void *ret;
int order = get_order(size);
@@ -738,8 +739,8 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
* GFP_DMA memory; fall back on map_single(), which
* will grab memory from the lowest available address range.
*/
- phys_addr_t paddr = map_single(hwdev, 0, size,
- DMA_FROM_DEVICE, 0);
+ phys_addr_t paddr = map_single(hwdev, 0, size, DMA_FROM_DEVICE,
+ warn ? 0 : DMA_ATTR_NO_WARN);
if (paddr == SWIOTLB_MAP_ERROR)
goto err_warn;
@@ -769,9 +770,11 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
return ret;
err_warn:
- pr_warn("swiotlb: coherent allocation failed for device %s size=%zu\n",
- dev_name(hwdev), size);
- dump_stack();
+ if (warn && printk_ratelimit()) {
+ pr_warn("swiotlb: coherent allocation failed for device %s size=%zu\n",
+ dev_name(hwdev), size);
+ dump_stack();
+ }
return NULL;
}