linux-kernel - [PATCH] misc: rtsx: set NULL intfdata when probe fails

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Date:   Fri, 29 Apr 2022 15:09:13 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     arnd@...db.de, gregkh@...uxfoundation.org
Cc:     Shuah Khan <skhan@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] misc: rtsx: set NULL intfdata when probe fails

rtsx_usb_probe() doesn't call usb_set_intfdata() to null out the
interface pointer when probe fails. This leaves a stale pointer.
Noticed the missing usb_set_intfdata() while debugging an unrelated
invalid DMA mapping problem.

Fix it with a call to usb_set_intfdata(..., NULL).

Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
---
 drivers/misc/cardreader/rtsx_usb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/cardreader/rtsx_usb.c b/drivers/misc/cardreader/rtsx_usb.c
index 59eda55d92a3..1ef9b61077c4 100644
--- a/drivers/misc/cardreader/rtsx_usb.c
+++ b/drivers/misc/cardreader/rtsx_usb.c
@@ -667,6 +667,7 @@ static int rtsx_usb_probe(struct usb_interface *intf,
 	return 0;
 
 out_init_fail:
+	usb_set_intfdata(ucr->pusb_intf, NULL);
 	usb_free_coherent(ucr->pusb_dev, IOBUF_SIZE, ucr->iobuf,
 			ucr->iobuf_dma);
 	return ret;
-- 
2.32.0