diff options
| author | Ludovic Desroches <ludovic.desroches@atmel.com> | 2013-09-09 17:29:56 +0200 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-09-25 21:45:36 -0400 |
| commit | c1fa3426aa5c782724c97394303d52228206eda4 (patch) | |
| tree | da338058843a4a3609ac551cae4ebe424b9f40f6 | |
| parent | a27fbf2f067b0cd6f172c8b696b9a44c58bfaa7a (diff) | |
mmc: atmel-mci: abort transfer on timeout error
When a software timeout occurs, the transfer is not stopped. In DMA case,
it causes DMA channel to be stuck because the transfer is still active
causing following transfers to be queued but not computed.
Cc: <stable@vger.kernel.org> # 3.9+
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Reported-by: Alexander Morozov <etesial@gmail.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
| -rw-r--r-- | drivers/mmc/host/atmel-mci.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c index 69e438ee043..b8dfe0d8adb 100644 --- a/drivers/mmc/host/atmel-mci.c +++ b/drivers/mmc/host/atmel-mci.c @@ -589,6 +589,13 @@ static void atmci_timeout_timer(unsigned long data) if (host->mrq->cmd->data) { host->mrq->cmd->data->error = -ETIMEDOUT; host->data = NULL; + /* + * With some SDIO modules, sometimes DMA transfer hangs. If + * stop_transfer() is not called then the DMA request is not + * removed, following ones are queued and never computed. + */ + if (host->state == STATE_DATA_XFER) + host->stop_transfer(host); } else { host->mrq->cmd->error = -ETIMEDOUT; host->cmd = NULL; |