[PATCH] [media] rc: winbond-cir: fix potential double free in wbcir_probe()

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From: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>

Since rc_unregister_device() frees its argument, the subsequently
call to rc_free_device() on the same variable will cause a double
free bug. Fix by set argument to NULL, thus when fall through to
rc_free_device(), nothing will be done there.

Signed-off-by: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>
---
 drivers/media/rc/winbond-cir.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/rc/winbond-cir.c b/drivers/media/rc/winbond-cir.c
index 535a18d..87af2d3 100644
--- a/drivers/media/rc/winbond-cir.c
+++ b/drivers/media/rc/winbond-cir.c
@@ -1151,6 +1151,7 @@ exit_release_wbase:
 	release_region(data->wbase, WAKEUP_IOMEM_LEN);
 exit_unregister_device:
 	rc_unregister_device(data->dev);
+	data->dev = NULL;
 exit_free_rc:
 	rc_free_device(data->dev);
 exit_unregister_led:

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