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ARM: mmci: round down the bytes transferred on error 

We should not report incomplete blocks on error.  Return the number of
bytes successfully transferred, rounded down to the nearest block.

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2011-01-30 21:06:53 +00:00
parent ccff9b5182
commit 613b152c63
1 changed files with 4 additions and 3 deletions
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7
drivers/mmc/host/mmci.c
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@ -14,6 +14,7 @@
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/highmem.h>
@ -289,13 +290,13 @@ mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
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 - 1) / data->blksz) * data->blksz;
host->data_xfered = round_down(success - 1, data->blksz);
data->error = -EILSEQ;
} else if (status & MCI_DATATIMEOUT) {
host->data_xfered = success;
host->data_xfered = round_down(success, data->blksz);
data->error = -ETIMEDOUT;
} else if (status & (MCI_TXUNDERRUN|MCI_RXOVERRUN)) {
host->data_xfered = success;
host->data_xfered = round_down(success, data->blksz);
data->error = -EIO;
}