This is a note to let you know that I've just added the patch titled
mmc: mxs: Initialize the spinlock prior to using it
to the 4.8-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-mxs-initialize-the-spinlock-prior-to-using-it.patch
and it can be found in the queue-4.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f91346e8b5f46aaf12f1df26e87140584ffd1b3f Mon Sep 17 00:00:00 2001
From: Fabio Estevam <fabio.estevam@xxxxxxx>
Date: Sat, 5 Nov 2016 17:45:07 -0200
Subject: mmc: mxs: Initialize the spinlock prior to using it
From: Fabio Estevam <fabio.estevam@xxxxxxx>
commit f91346e8b5f46aaf12f1df26e87140584ffd1b3f upstream.
An interrupt may occur right after devm_request_irq() is called and
prior to the spinlock initialization, leading to a kernel oops,
as the interrupt handler uses the spinlock.
In order to prevent this problem, move the spinlock initialization
prior to requesting the interrupts.
Fixes: e4243f13d10e (mmc: mxs-mmc: add mmc host driver for i.MX23/28)
Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxx>
Reviewed-by: Marek Vasut <marex@xxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/mxs-mmc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -661,13 +661,13 @@ static int mxs_mmc_probe(struct platform
platform_set_drvdata(pdev, mmc);
+ spin_lock_init(&host->lock);
+
ret = devm_request_irq(&pdev->dev, irq_err, mxs_mmc_irq_handler, 0,
dev_name(&pdev->dev), host);
if (ret)
goto out_free_dma;
- spin_lock_init(&host->lock);
-
ret = mmc_add_host(mmc);
if (ret)
goto out_free_dma;
Patches currently in stable-queue which might be from fabio.estevam@xxxxxxx are
queue-4.8/mmc-mxs-initialize-the-spinlock-prior-to-using-it.patch
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