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| author | Haijun Zhang | 2012-12-04 03:41:28 +0100 |
|---|---|---|
| committer | Chris Ball | 2012-12-06 19:55:13 +0100 |
| commit | a4071fbbb9edbc5a24985b2f64ed45f35b90dbeb (patch) | |
| tree | b4aed64d9190298577ead540d5b121603b15eadd /drivers/mmc/host/sdhci.c | |
| parent | mmc: dw_mmc: remove duplicated buswidth code (diff) | |
| download | kernel-qcow2-linux-a4071fbbb9edbc5a24985b2f64ed45f35b90dbeb.tar.gz kernel-qcow2-linux-a4071fbbb9edbc5a24985b2f64ed45f35b90dbeb.tar.xz kernel-qcow2-linux-a4071fbbb9edbc5a24985b2f64ed45f35b90dbeb.zip | |
mmc: eSDHC: Recover from ADMA errors
A-003500: False ADMA Error might be reported when ADMA is used for
multiple block read command with Stop at Block Gap. If PROCTL[SABGREQ]
is set when the particular block's data is received by the System side
logic before entire block (with CRC) data is received by the SD side
logic, and also if ADMA descriptor line is fetched at the same time,
then DMA engine might report false ADMA error. eSDHC might not be able
to Continue (PROCTL[CREQ]=1) after Stop at Block Gap.
This issue will impact the eSDHC IP VVN2.3.
Signed-off-by: Haijun Zhang <Haijun.Zhang@freescale.com>
Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index f78c5b1329eb..b2e4b1bab69d 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2282,6 +2282,8 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) pr_err("%s: ADMA error\n", mmc_hostname(host->mmc)); sdhci_show_adma_error(host); host->data->error = -EIO; + if (host->ops->adma_workaround) + host->ops->adma_workaround(host, intmask); } if (host->data->error) |