From: Linus Walleij <linus.walleij@stericsson.com>
Date: Thu, 27 Jan 2011 16:44:34 +0000 (+0100)
Subject: ARM: 6642/1: mmci: calculate remaining bytes at error correctly
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f5a106d9e2a5d947e106c3caace373ded1a695ed;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

ARM: 6642/1: mmci: calculate remaining bytes at error correctly

The MMCIDATACNT register contain the number of byte left at error
not the number of words, so loose the << 2 thing. Further if CRC
fails on the first block, we may end up with a negative number
of transferred bytes which is not good, and the formula was in
wrong order.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 4b8dcd5b2a01..b6fd6dcb41e7 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -283,13 +283,13 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
 		u32 remain, success;
 
 		/* Calculate how far we are into the transfer */
-		remain = readl(host->base + MMCIDATACNT) << 2;
+		remain = readl(host->base + MMCIDATACNT);
 		success = data->blksz * data->blocks - remain;
 
 		dev_dbg(mmc_dev(host->mmc), "MCI ERROR IRQ (status %08x)\n", status);
 		if (status & MCI_DATACRCFAIL) {
 			/* Last block was not successful */
-			host->data_xfered = ((success / data->blksz) - 1 * data->blksz);
+			host->data_xfered = ((success - 1) / data->blksz) * data->blksz;
 			data->error = -EILSEQ;
 		} else if (status & MCI_DATATIMEOUT) {
 			host->data_xfered = success;