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authorChristoph Hellwig <hch@lst.de>2022-05-11 09:13:57 +0300
committerChristoph Hellwig <hch@lst.de>2022-05-13 13:49:18 +0300
commita5e891321a219679d5a2828150a7dda29a47d8a6 (patch)
tree0e002f243288f4fe04618ab50062f20e3b07ed72 /kernel/dma
parent1521c607cabe7c7edb028e211e88ba1e0f19714e (diff)
downloadlinux-a5e891321a219679d5a2828150a7dda29a47d8a6.tar.xz
swiotlb: use the right nslabs value in swiotlb_init_remap
default_nslabs should only be used to initialize nslabs, after that we need to use the local variable that can shrink when allocations or the remap don't succeed. Fixes: 6424e31b1c05 ("swiotlb: remove swiotlb_init_with_tbl and swiotlb_init_late_with_tbl") Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Diffstat (limited to 'kernel/dma')
-rw-r--r--kernel/dma/swiotlb.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 3e992a308c8a..113e1e8aaca3 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -234,7 +234,7 @@ void __init swiotlb_init_remap(bool addressing_limit, unsigned int flags,
{
struct io_tlb_mem *mem = &io_tlb_default_mem;
unsigned long nslabs = default_nslabs;
- size_t alloc_size = PAGE_ALIGN(array_size(sizeof(*mem->slots), nslabs));
+ size_t alloc_size;
size_t bytes;
void *tlb;
@@ -249,7 +249,7 @@ void __init swiotlb_init_remap(bool addressing_limit, unsigned int flags,
* memory encryption.
*/
retry:
- bytes = PAGE_ALIGN(default_nslabs << IO_TLB_SHIFT);
+ bytes = PAGE_ALIGN(nslabs << IO_TLB_SHIFT);
if (flags & SWIOTLB_ANY)
tlb = memblock_alloc(bytes, PAGE_SIZE);
else
@@ -269,12 +269,13 @@ retry:
goto retry;
}
+ alloc_size = PAGE_ALIGN(array_size(sizeof(*mem->slots), nslabs));
mem->slots = memblock_alloc(alloc_size, PAGE_SIZE);
if (!mem->slots)
panic("%s: Failed to allocate %zu bytes align=0x%lx\n",
__func__, alloc_size, PAGE_SIZE);
- swiotlb_init_io_tlb_mem(mem, __pa(tlb), default_nslabs, false);
+ swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false);
mem->force_bounce = flags & SWIOTLB_FORCE;
if (flags & SWIOTLB_VERBOSE)