diff options
| author | Keith Busch <kbusch@kernel.org> | 2023-01-26 22:51:20 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-05-06 19:33:37 +0200 |
| commit | 5407df10e5754b80d43697a75484bacda048fef8 (patch) | |
| tree | 29bff767dbf954761916f87e0188edfd80f6ccdf /mm/dmapool.c | |
| parent | dmapool: move debug code to own functions (diff) | |
| download | linux-5407df10e5754b80d43697a75484bacda048fef8.tar.xz linux-5407df10e5754b80d43697a75484bacda048fef8.zip | |
dmapool: rearrange page alloc failure handling
Handle the error in a condition so the good path can be in the normal
flow.
Link: https://lkml.kernel.org/r/20230126215125.4069751-8-kbusch@meta.com
Fixes: 2d55c16c0c54 ("dmapool: create/destroy cleanup")
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/dmapool.c')
| -rw-r--r-- | mm/dmapool.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/mm/dmapool.c b/mm/dmapool.c index 30b069e99996..900f2afa363a 100644 --- a/mm/dmapool.c +++ b/mm/dmapool.c @@ -292,17 +292,19 @@ static struct dma_page *pool_alloc_page(struct dma_pool *pool, gfp_t mem_flags) page = kmalloc(sizeof(*page), mem_flags); if (!page) return NULL; + page->vaddr = dma_alloc_coherent(pool->dev, pool->allocation, &page->dma, mem_flags); - if (page->vaddr) { - pool_init_page(pool, page); - pool_initialise_page(pool, page); - page->in_use = 0; - page->offset = 0; - } else { + if (!page->vaddr) { kfree(page); - page = NULL; + return NULL; } + + pool_init_page(pool, page); + pool_initialise_page(pool, page); + page->in_use = 0; + page->offset = 0; + return page; } |