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mmc: dw_mmc: handle "no CRC status" error

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When a data write isn't acknowledged by the card (so no CRC status token
is detected after the data), the error -EIO is returned instead of the
-ETIMEDOUT expected by mmc_test 15 - "Correct xfer_size at write (start
failure)" and 17 "Correct xfer_size at write (midway failure)". In PIO
mode the reported number of bytes transferred is also exaggerated since
the last block actually failed.

Handle the "Write no CRC" error specially, setting the error to
-ETIMEDOUT and setting the bytes_xferred to 0.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
James Hogan 2011-06-29 09:29:58 +01:00 committed by Chris Ball
parent ae837fe6dd
commit 55c5efbc0d
1 changed files with 15 additions and 4 deletions
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19
drivers/mmc/host/dw_mmc.c
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@ -496,15 +496,16 @@ static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data)
host->sg = NULL;
host->data = data;
if (data->flags & MMC_DATA_READ)
host->dir_status = DW_MCI_RECV_STATUS;
else
host->dir_status = DW_MCI_SEND_STATUS;
if (dw_mci_submit_data_dma(host, data)) {
host->sg = data->sg;
host->pio_offset = 0;
host->part_buf_start = 0;
host->part_buf_count = 0;
if (data->flags & MMC_DATA_READ)
host->dir_status = DW_MCI_RECV_STATUS;
else
host->dir_status = DW_MCI_SEND_STATUS;
mci_writel(host, RINTSTS, SDMMC_INT_TXDR | SDMMC_INT_RXDR);
temp = mci_readl(host, INTMASK);
@ -911,6 +912,16 @@ static void dw_mci_tasklet_func(unsigned long priv)
data->error = -ETIMEDOUT;
} else if (status & SDMMC_INT_DCRC) {
data->error = -EILSEQ;
} else if (status & SDMMC_INT_EBE &&
host->dir_status ==
DW_MCI_SEND_STATUS) {
/*
* No data CRC status was returned.
* The number of bytes transferred will
* be exaggerated in PIO mode.
*/
data->bytes_xfered = 0;
data->error = -ETIMEDOUT;
} else {
dev_err(&host->pdev->dev,
"data FIFO error "