From: Pierre Ossman <drzeus@drzeus.cx>
Date: Sun, 12 Aug 2007 11:13:24 +0000 (+0200)
Subject: sdhci: be more cautious about block count register
X-Git-Tag: v2.6.23-rc4~27^2~3
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2b061973404802fb87db93175b856ee0dfbe38e4;p=linux-2.6

sdhci: be more cautious about block count register

The block count register shouldn't be trusted for single block transfers,
so avoid using it completely when calculating transferred bytes.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
---

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index f2bc87ac24..7181e86786 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -477,8 +477,8 @@ static void sdhci_finish_data(struct sdhci_host *host)
 	/*
 	 * Controller doesn't count down when in single block mode.
 	 */
-	if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
-		blocks = 0;
+	if (data->blocks == 1)
+		blocks = (data->error == MMC_ERR_NONE) ? 0 : 1;
 	else
 		blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
 	data->bytes_xfered = data->blksz * (data->blocks - blocks);