From d38913a2a6582373493238ab38206335be953e85 Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Sat, 5 Nov 2016 17:45:07 -0200 Subject: [PATCH 1/1] mmc: mxs: Initialize the spinlock prior to using it 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 Reviewed-by: Marek Vasut Signed-off-by: Ulf Hansson [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings --- drivers/mmc/host/mxs-mmc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c index f201bed74442..0c781acf3df4 100644 --- a/drivers/mmc/host/mxs-mmc.c +++ b/drivers/mmc/host/mxs-mmc.c @@ -752,12 +752,12 @@ static int mxs_mmc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, mmc); + spin_lock_init(&host->lock); + ret = request_irq(host->irq, mxs_mmc_irq_handler, 0, DRIVER_NAME, host); if (ret) goto out_free_dma; - spin_lock_init(&host->lock); - ret = mmc_add_host(mmc); if (ret) goto out_free_irq; -- 2.39.2