zero out dma_length in the entry immediately following the last mapped
entry for unmap_sg.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
FUJITA Tomonori 2007-10-23 12:58:39 +02:00 коммит произвёл Jens Axboe
Родитель 83fcaf7040
Коммит cb92ae8150
1 изменённых файлов: 5 добавлений и 0 удалений

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@ -233,6 +233,11 @@ unsigned long prepare_sg(struct scatterlist *sg, int nents)
dma_sg->dma_address = dent_addr;
dma_sg->dma_length = dent_len;
if (dma_sg != sg) {
dma_sg = next_sg(dma_sg);
dma_sg->dma_length = 0;
}
return ((unsigned long) dent_addr +
(unsigned long) dent_len +
(IO_PAGE_SIZE - 1UL)) >> IO_PAGE_SHIFT;