linux-kernel - [PATCH] ARM: pxa: Fix error handling in viper_tpm

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Date:   Mon, 27 Dec 2021 12:51:53 +0000
From:   Miaoqian Lin <linmq006@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     linmq006@...il.com, Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Russell King <linux@...linux.org.uk>,
        Marc Zyngier <marc.zyngier@...ran.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: pxa: Fix error handling in viper_tpm_init

tpm_device get by platform_device_alloc(), which calls device_initialize.
Call platform_device_put(tpm_device) instead of kfree(tmp_device) to
prevent memory leak.

Fixes: 352699a ("Basic support for the Arcom/Eurotech Viper SBC.")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 arch/arm/mach-pxa/viper.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c
index 3aa34e9a15d3..9a0f184dbecb 100644
--- a/arch/arm/mach-pxa/viper.c
+++ b/arch/arm/mach-pxa/viper.c
@@ -815,11 +815,11 @@ static void __init viper_tpm_init(void)
 					      sizeof(i2c_tpm_data))) {
 			if (platform_device_add(tpm_device)) {
 				errstr = "register TPM i2c bus";
-				goto error_free_tpm;
+				goto exit_put_device;
 			}
 		} else {
 			errstr = "allocate TPM i2c bus data";
-			goto error_free_tpm;
+			goto exit_put_device;
 		}
 	} else {
 		errstr = "allocate TPM i2c device";
@@ -827,9 +827,8 @@ static void __init viper_tpm_init(void)
 	}
 
 	return;
-
-error_free_tpm:
-	kfree(tpm_device);
+exit_put_device:
+	platform_device_put(tpm_device);
 error_tpm:
 	pr_err("viper: Couldn't %s, giving up\n", errstr);
 }
-- 
2.17.1