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mmc: mxs: Initialize the spinlock prior to using it

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commit f91346e8b5 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: e4243f13d1 (mmc: mxs-mmc: add mmc host driver for i.MX23/28)
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Fabio Estevam
2016-11-05 17:45:07 -02:00
committed by Greg Kroah-Hartman
parent ae5b8dbfe6
commit ae6d4df4a7
1 changed files with 2 additions and 2 deletions
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4
drivers/mmc/host/mxs-mmc.c
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@@ -661,13 +661,13 @@ static int mxs_mmc_probe(struct platform_device *pdev)
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;