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path: root/drivers/ata/sata_sil24.c
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Diffstat (limited to 'drivers/ata/sata_sil24.c')
-rw-r--r--drivers/ata/sata_sil24.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index a7f0139c3aae..be7726d7686d 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -622,6 +622,11 @@ static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp,
622 irq_enabled = readl(port + PORT_IRQ_ENABLE_SET); 622 irq_enabled = readl(port + PORT_IRQ_ENABLE_SET);
623 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR); 623 writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR, port + PORT_IRQ_ENABLE_CLR);
624 624
625 /*
626 * The barrier is required to ensure that writes to cmd_block reach
627 * the memory before the write to PORT_CMD_ACTIVATE.
628 */
629 wmb();
625 writel((u32)paddr, port + PORT_CMD_ACTIVATE); 630 writel((u32)paddr, port + PORT_CMD_ACTIVATE);
626 writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4); 631 writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4);
627 632
@@ -895,6 +900,11 @@ static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc)
895 paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block); 900 paddr = pp->cmd_block_dma + tag * sizeof(*pp->cmd_block);
896 activate = port + PORT_CMD_ACTIVATE + tag * 8; 901 activate = port + PORT_CMD_ACTIVATE + tag * 8;
897 902
903 /*
904 * The barrier is required to ensure that writes to cmd_block reach
905 * the memory before the write to PORT_CMD_ACTIVATE.
906 */
907 wmb();
898 writel((u32)paddr, activate); 908 writel((u32)paddr, activate);
899 writel((u64)paddr >> 32, activate + 4); 909 writel((u64)paddr >> 32, activate + 4);
900 910