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39 lines
1.4 KiB
Diff
39 lines
1.4 KiB
Diff
From 4a15e086fa9531f808c15b8fb8d7ed1fdb411b74 Mon Sep 17 00:00:00 2001
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From: Lukas Wunner <lukas@wunner.de>
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Date: Sat, 19 Jan 2019 09:00:26 +0100
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Subject: [PATCH] bcm2835-mmc: Fix duplicate free_irq() on remove
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The BCM2835 MMC host driver requests its interrupt as a device-managed
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resource, so the interrupt is automatically freed after the driver is
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unbound.
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However on driver unbind, bcm2835_mmc_remove() frees the interrupt
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explicitly to avoid invocation of the interrupt handler after driver
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structures have been torn down.
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The interrupt is thus freed twice, leading to a WARN splat in
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__free_irq(). Fix by not requesting the interrupt as a device-managed
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resource.
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Signed-off-by: Lukas Wunner <lukas@wunner.de>
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Cc: Frank Pavlic <f.pavlic@kunbus.de>
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---
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drivers/mmc/host/bcm2835-mmc.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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--- a/drivers/mmc/host/bcm2835-mmc.c
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+++ b/drivers/mmc/host/bcm2835-mmc.c
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@@ -1389,9 +1389,9 @@ static int bcm2835_mmc_add_host(struct b
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init_waitqueue_head(&host->buf_ready_int);
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bcm2835_mmc_init(host, 0);
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- ret = devm_request_threaded_irq(dev, host->irq, bcm2835_mmc_irq,
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- bcm2835_mmc_thread_irq, IRQF_SHARED,
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- mmc_hostname(mmc), host);
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+ ret = request_threaded_irq(host->irq, bcm2835_mmc_irq,
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+ bcm2835_mmc_thread_irq, IRQF_SHARED,
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+ mmc_hostname(mmc), host);
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if (ret) {
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dev_err(dev, "Failed to request IRQ %d: %d\n", host->irq, ret);
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goto untasklet;
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