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[ARM] 3755/1: dmabounce: fix return value for find_safe_buffer
Patch from Kevin Hilman Previous locking changes to dmabounce incorrectly return non-NULL even when buffer not found. Fix it up. Signed-off-by: Kevin Hilman <khilman@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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1 changed files with 5 additions and 3 deletions
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@ -179,17 +179,19 @@ alloc_safe_buffer(struct dmabounce_device_info *device_info, void *ptr,
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static inline struct safe_buffer *
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find_safe_buffer(struct dmabounce_device_info *device_info, dma_addr_t safe_dma_addr)
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{
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struct safe_buffer *b = NULL;
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struct safe_buffer *b, *rb = NULL;
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unsigned long flags;
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read_lock_irqsave(&device_info->lock, flags);
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list_for_each_entry(b, &device_info->safe_buffers, node)
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if (b->safe_dma_addr == safe_dma_addr)
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if (b->safe_dma_addr == safe_dma_addr) {
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rb = b;
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break;
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}
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read_unlock_irqrestore(&device_info->lock, flags);
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return b;
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return rb;
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}
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static inline void
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