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authorLudovic Desroches <ludovic.desroches@atmel.com>2013-09-09 17:29:56 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-12-04 10:56:39 -0800
commit6edfd0331f788a5d62736c6a422488708175b4c4 (patch)
tree2196c2fa4fb99d2919c074370c762c3c74279a44 /drivers/mmc
parent3cbafaa72d3afc4a4177f0d76178cd26a525589b (diff)
mmc: atmel-mci: abort transfer on timeout error
commit c1fa3426aa5c782724c97394303d52228206eda4 upstream. 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. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/atmel-mci.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index aca59d93d5a9..5d68ac958112 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -584,6 +584,13 @@ 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;