Commit 8d8002f6 authored Mar 18, 2008 by Dan Williams

async_tx: avoid the async xor_zero_sum path when src_cnt > device->max_xor



If the channel cannot perform the operation in one call to
->device_prep_dma_zero_sum, then fallback to the xor+page_is_zero path.
This only affects users with arrays larger than 16 devices on iop13xx or
32 devices on iop3xx.

Cc: <stable@kernel.org>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

parent f79abb62

crypto/async_tx/async_xor.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -271,7 +271,7 @@ async_xor_zero_sum(struct page dest, struct page *src_list,

		BUG_ON(src_cnt <= 1);

		if (device) {
		if (device && src_cnt <= device->max_xor) {
		dma_addr_t dma_src = (dma_addr_t ) src_list;
		unsigned long dma_prep_flags = cb_fn ? DMA_PREP_INTERRUPT : 0;
		int i;