From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Sat, 9 Jul 2016 15:40:22 +0000 (+0900)
Subject: mmc: sdhci: clean up timeout detection
X-Git-Tag: v2016.09-rc2~98^2~13
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=bae4a1fdf59cddf02acd0070d1da7303fe5ffd0e;p=oweals%2Fu-boot.git

mmc: sdhci: clean up timeout detection

The current timeout detection logic is not very nice; it calls
get_timer(start) in the while() loop, and then calls it again after
the loop to check if a timeout error happened.

Because of the time difference between the two calls of get_timer(),
the timeout detected after the loop may not be true.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
---

diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 9fdbed8aa9..1de1f8ea01 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -252,17 +252,17 @@ static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
 		stat = sdhci_readl(host, SDHCI_INT_STATUS);
 		if (stat & SDHCI_INT_ERROR)
 			break;
-	} while (((stat & mask) != mask) &&
-		 (get_timer(start) < SDHCI_READ_STATUS_TIMEOUT));
 
-	if (get_timer(start) >= SDHCI_READ_STATUS_TIMEOUT) {
-		if (host->quirks & SDHCI_QUIRK_BROKEN_R1B)
-			return 0;
-		else {
-			printf("%s: Timeout for status update!\n", __func__);
-			return TIMEOUT;
+		if (get_timer(start) >= SDHCI_READ_STATUS_TIMEOUT) {
+			if (host->quirks & SDHCI_QUIRK_BROKEN_R1B) {
+				return 0;
+			} else {
+				printf("%s: Timeout for status update!\n",
+				       __func__);
+				return TIMEOUT;
+			}
 		}
-	}
+	} while ((stat & mask) != mask);
 
 	if ((stat & (SDHCI_INT_ERROR | mask)) == mask) {
 		sdhci_cmd_done(host, cmd);