linux-kernel - [PATCH v2] hwmon: (occ) remove NULL check before kvfree

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Date:   Tue, 14 Jun 2022 21:30:22 +0800
From:   Dongliang Mu <dzm91@...t.edu.cn>
To:     Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Eddie James <eajames@...ux.ibm.com>,
        Joel Stanley <joel@....id.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dongliang Mu <mudongliangabcd@...il.com>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     Pekka Enberg <penberg@...nel.org>, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] hwmon: (occ) remove NULL check before kvfree

From: Dongliang Mu <mudongliangabcd@...il.com>

kvfree can handle NULL pointer as its argument.
According to coccinelle isnullfree check, remove NULL check
before kvfree operation.

Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>
---
v1->v2: modify the commit title and signature
 drivers/hwmon/occ/p9_sbe.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/hwmon/occ/p9_sbe.c b/drivers/hwmon/occ/p9_sbe.c
index 42fc7b97bb34..01405ae2f9bd 100644
--- a/drivers/hwmon/occ/p9_sbe.c
+++ b/drivers/hwmon/occ/p9_sbe.c
@@ -55,8 +55,7 @@ static bool p9_sbe_occ_save_ffdc(struct p9_sbe_occ *ctx, const void *resp,
 	mutex_lock(&ctx->sbe_error_lock);
 	if (!ctx->sbe_error) {
 		if (resp_len > ctx->ffdc_size) {
-			if (ctx->ffdc)
-				kvfree(ctx->ffdc);
+			kvfree(ctx->ffdc);
 			ctx->ffdc = kvmalloc(resp_len, GFP_KERNEL);
 			if (!ctx->ffdc) {
 				ctx->ffdc_len = 0;
@@ -171,8 +170,7 @@ static int p9_sbe_occ_remove(struct platform_device *pdev)
 	ctx->sbe = NULL;
 	occ_shutdown(occ);
 
-	if (ctx->ffdc)
-		kvfree(ctx->ffdc);
+	kvfree(ctx->ffdc);
 
 	return 0;
 }
-- 
2.35.1