This is a note to let you know that I've just added the patch titled
mmc: atmel-mci: abort transfer on timeout error
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-atmel-mci-abort-transfer-on-timeout-error.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c1fa3426aa5c782724c97394303d52228206eda4 Mon Sep 17 00:00:00 2001
From: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
Date: Mon, 9 Sep 2013 17:29:56 +0200
Subject: mmc: atmel-mci: abort transfer on timeout error
From: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
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@xxxxxxxxx>
Reported-by: Alexander Morozov <etesial@xxxxxxxxx>
Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
Signed-off-by: Chris Ball <cjb@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/atmel-mci.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -589,6 +589,13 @@ static void atmci_timeout_timer(unsigned
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;
Patches currently in stable-queue which might be from ludovic.desroches@xxxxxxxxx are
queue-3.12/mmc-atmel-mci-fix-oops-in-atmci_tasklet_func.patch
queue-3.12/mmc-atmel-mci-abort-transfer-on-timeout-error.patch
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