From: Tang Yuantian <Yuantian.Tang@nxp.com>
Date: Thu, 14 Apr 2016 08:21:00 +0000 (+0800)
Subject: ahci: flush dcache before issuing command
X-Git-Tag: v2016.05-rc2~13
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=75e14b1ac87564f1f2f7401828c3fefd316e818f;p=oweals%2Fu-boot.git

ahci: flush dcache before issuing command

Ensure data the following sata command used is flushed out of dcache
and written to physical memory or timeout error may happen.

Signed-off-by: Tang Yuantian <yuantian.tang@nxp.com>
---

diff --git a/drivers/block/ahci.c b/drivers/block/ahci.c
index d29642be77..e3e783a74c 100644
--- a/drivers/block/ahci.c
+++ b/drivers/block/ahci.c
@@ -1061,6 +1061,7 @@ static int ata_io_flush(u8 port)
 
 	memcpy((unsigned char *)pp->cmd_tbl, fis, 20);
 	ahci_fill_cmd_slot(pp, cmd_fis_len);
+	ahci_dcache_flush_sata_cmd(pp);
 	writel_with_flush(1, port_mmio + PORT_CMD_ISSUE);
 
 	if (waiting_for_cmd_completed(port_mmio + PORT_CMD_ISSUE,