This is a note to let you know that I've just added the patch titled
mmc: sh-mmcif: avoid oops on spurious interrupts (second try)
to the 3.6-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-sh-mmcif-avoid-oops-on-spurious-interrupts-second-try.patch
and it can be found in the queue-3.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 91ab252ac5a5c3461dd6910797611e9172626aed Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <[email protected]>
Date: Wed, 22 Aug 2012 06:49:47 +0000
Subject: mmc: sh-mmcif: avoid oops on spurious interrupts (second try)
From: Guennadi Liakhovetski <[email protected]>
commit 91ab252ac5a5c3461dd6910797611e9172626aed upstream.
On some systems, e.g., kzm9g, MMCIF interfaces can produce spurious
interrupts without any active request. To prevent the Oops, that results
in such cases, don't dereference the mmc request pointer until we make
sure, that we are indeed processing such a request.
Reported-by: Tetsuyuki Kobayashi <[email protected]>
Signed-off-by: Guennadi Liakhovetski <[email protected]>
Tested-by: Tetsuyuki Kobayashi <[email protected]>
Signed-off-by: Chris Ball <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/mmc/host/sh_mmcif.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -1104,7 +1104,6 @@ static irqreturn_t sh_mmcif_irqt(int irq
{
struct sh_mmcif_host *host = dev_id;
struct mmc_request *mrq = host->mrq;
- struct mmc_data *data = mrq->data;
cancel_delayed_work_sync(&host->timeout_work);
@@ -1152,13 +1151,14 @@ static irqreturn_t sh_mmcif_irqt(int irq
case MMCIF_WAIT_FOR_READ_END:
case MMCIF_WAIT_FOR_WRITE_END:
if (host->sd_error)
- data->error = sh_mmcif_error_manage(host);
+ mrq->data->error = sh_mmcif_error_manage(host);
break;
default:
BUG();
}
if (host->wait_for != MMCIF_WAIT_FOR_STOP) {
+ struct mmc_data *data = mrq->data;
if (!mrq->cmd->error && data && !data->error)
data->bytes_xfered =
data->blocks * data->blksz;
Patches currently in stable-queue which might be from [email protected] are
queue-3.6/mmc-sh-mmcif-avoid-oops-on-spurious-interrupts-second-try.patch
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