In commit af7ddd8a627c ("Merge tag 'dma-mapping-4.21' of git://git.infradead.org/users/hch/dma-mapping"),, dmam_alloc_coherent has already zeroed the memory. So memset is not needed. Signed-off-by: Fuqian Huang <huangfq.daxian@xxxxxxxxx> --- drivers/ata/sata_sil24.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c index bfdf41912588..98aad8206921 100644 --- a/drivers/ata/sata_sil24.c +++ b/drivers/ata/sata_sil24.c @@ -1202,7 +1202,6 @@ static int sil24_port_start(struct ata_port *ap) cb = dmam_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL); if (!cb) return -ENOMEM; - memset(cb, 0, cb_size); pp->cmd_block = cb; pp->cmd_block_dma = cb_dma; -- 2.11.0