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Commit e2785f0d authored by Kevin Hilman's avatar Kevin Hilman Committed by Russell King
Browse files

[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: default avatarKevin Hilman <khilman@mvista.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 332158e7

arch/arm/common/dmabounce.c

+5 −3
Original line number Diff line number Diff line
@@ -179,17 +179,19 @@ alloc_safe_buffer(struct dmabounce_device_info *device_info, void *ptr, 
static inline struct safe_buffer *

find_safe_buffer(struct dmabounce_device_info *device_info, dma_addr_t safe_dma_addr)

{

	struct safe_buffer *b = NULL;

	struct safe_buffer *b, *rb = NULL;

	unsigned long flags;



	read_lock_irqsave(&device_info->lock, flags);



	list_for_each_entry(b, &device_info->safe_buffers, node)

		if (b->safe_dma_addr == safe_dma_addr)

		if (b->safe_dma_addr == safe_dma_addr) {

			rb = b;

			break;

		}



	read_unlock_irqrestore(&device_info->lock, flags);

	return b;

	return rb;

}



static inline void