linux-kernel - [PATCH 4.4 018/114] can: softing_cs: softingcs_probe(): fix memleak on registration failure

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Message-Id: <20220124183927.678729716@linuxfoundation.org>
Date:   Mon, 24 Jan 2022 19:41:53 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Johan Hovold <johan@...nel.org>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 4.4 018/114] can: softing_cs: softingcs_probe(): fix memleak on registration failure

From: Johan Hovold <johan@...nel.org>

commit ced4913efb0acc844ed65cc01d091a85d83a2082 upstream.

In case device registration fails during probe, the driver state and
the embedded platform device structure needs to be freed using
platform_device_put() to properly free all resources (e.g. the device
name).

Fixes: 0a0b7a5f7a04 ("can: add driver for Softing card")
Link: https://lore.kernel.org/all/20211222104843.6105-1-johan@kernel.org
Cc: stable@...r.kernel.org # 2.6.38
Signed-off-by: Johan Hovold <johan@...nel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/can/softing/softing_cs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/can/softing/softing_cs.c
+++ b/drivers/net/can/softing/softing_cs.c
@@ -304,7 +304,7 @@ static int softingcs_probe(struct pcmcia
 	return 0;
 
 platform_failed:
-	kfree(dev);
+	platform_device_put(pdev);
 mem_failed:
 pcmcia_bad:
 pcmcia_failed: