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-rw-r--r--crypto/async_tx/async_pq.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/crypto/async_tx/async_pq.c b/crypto/async_tx/async_pq.c
index 6b5cc4fba59f..ec87f53d5059 100644
--- a/crypto/async_tx/async_pq.c
+++ b/crypto/async_tx/async_pq.c
@@ -240,6 +240,16 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
240} 240}
241EXPORT_SYMBOL_GPL(async_gen_syndrome); 241EXPORT_SYMBOL_GPL(async_gen_syndrome);
242 242
243static inline struct dma_chan *
244pq_val_chan(struct async_submit_ctl *submit, struct page **blocks, int disks, size_t len)
245{
246 #ifdef CONFIG_ASYNC_TX_DISABLE_PQ_VAL_DMA
247 return NULL;
248 #endif
249 return async_tx_find_channel(submit, DMA_PQ_VAL, NULL, 0, blocks,
250 disks, len);
251}
252
243/** 253/**
244 * async_syndrome_val - asynchronously validate a raid6 syndrome 254 * async_syndrome_val - asynchronously validate a raid6 syndrome
245 * @blocks: source blocks from idx 0..disks-3, P @ disks-2 and Q @ disks-1 255 * @blocks: source blocks from idx 0..disks-3, P @ disks-2 and Q @ disks-1
@@ -260,9 +270,7 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
260 size_t len, enum sum_check_flags *pqres, struct page *spare, 270 size_t len, enum sum_check_flags *pqres, struct page *spare,
261 struct async_submit_ctl *submit) 271 struct async_submit_ctl *submit)
262{ 272{
263 struct dma_chan *chan = async_tx_find_channel(submit, DMA_PQ_VAL, 273 struct dma_chan *chan = pq_val_chan(submit, blocks, disks, len);
264 NULL, 0, blocks, disks,
265 len);
266 struct dma_device *device = chan ? chan->device : NULL; 274 struct dma_device *device = chan ? chan->device : NULL;
267 struct dma_async_tx_descriptor *tx; 275 struct dma_async_tx_descriptor *tx;
268 unsigned char coefs[disks-2]; 276 unsigned char coefs[disks-2];