From 7cd04c863f9e1655d607705455e7714f24451984 Mon Sep 17 00:00:00 2001
From: frank zago <frank@zago.net>
Date: Mon, 26 Apr 2021 21:20:17 -0500
Subject: [PATCH] iio: light: tcs3472: do not free unallocated IRQ
Git-commit: 7cd04c863f9e1655d607705455e7714f24451984
Patch-mainline: v5.14-rc1
References: git-fixes
Allocating an IRQ is conditional to the IRQ existence, but freeing it
was not. If no IRQ was allocate, the driver would still try to free
IRQ 0. Add the missing checks.
This fixes the following trace when the driver is removed:
[ 100.667788] Trying to free already-free IRQ 0
[ 100.667793] WARNING: CPU: 0 PID: 2315 at kernel/irq/manage.c:1826 free_irq+0x1fd/0x370
...
[ 100.667914] Call Trace:
[ 100.667920] tcs3472_remove+0x3a/0x90 [tcs3472]
[ 100.667927] i2c_device_remove+0x2b/0xa0
Signed-off-by: frank zago <frank@zago.net>
Link: https://lore.kernel.org/r/20210427022017.19314-2-frank@zago.net
Fixes: 9d2f715d592e ("iio: light: tcs3472: support out-of-threshold events")
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/iio/light/tcs3472.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/light/tcs3472.c b/drivers/iio/light/tcs3472.c
index 90dc3fef59e6..371c6a39a165 100644
--- a/drivers/iio/light/tcs3472.c
+++ b/drivers/iio/light/tcs3472.c
@@ -535,7 +535,8 @@ static int tcs3472_probe(struct i2c_client *client,
return 0;
free_irq:
- free_irq(client->irq, indio_dev);
+ if (client->irq)
+ free_irq(client->irq, indio_dev);
buffer_cleanup:
iio_triggered_buffer_cleanup(indio_dev);
return ret;
@@ -563,7 +564,8 @@ static int tcs3472_remove(struct i2c_client *client)
struct iio_dev *indio_dev = i2c_get_clientdata(client);
iio_device_unregister(indio_dev);
- free_irq(client->irq, indio_dev);
+ if (client->irq)
+ free_irq(client->irq, indio_dev);
iio_triggered_buffer_cleanup(indio_dev);
tcs3472_powerdown(iio_priv(indio_dev));
--
2.26.2