linux-kernel - [PATCH] um: Remove some unnecessary NULL checks in vector

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Message-Id: <20200327193626.82329-1-alex.dewar@gmx.co.uk>
Date:   Fri, 27 Mar 2020 19:36:25 +0000
From:   Alex Dewar <alex.dewar@....co.uk>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Alex Dewar <alex.dewar@....co.uk>, Jeff Dike <jdike@...toit.com>,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        linux-um@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] um: Remove some unnecessary NULL checks in vector_user.c

kfree() already checks for null pointers, so additional checking is
unnecessary.

Signed-off-by: Alex Dewar <alex.dewar@....co.uk>
---
 arch/um/drivers/vector_user.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/arch/um/drivers/vector_user.c b/arch/um/drivers/vector_user.c
index ddcd917be0af..aa28e9eecb7b 100644
--- a/arch/um/drivers/vector_user.c
+++ b/arch/um/drivers/vector_user.c
@@ -221,8 +221,7 @@ static struct vector_fds *user_init_tap_fds(struct arglist *ifspec)
 	return result;
 tap_cleanup:
 	printk(UM_KERN_ERR "user_init_tap: init failed, error %d", fd);
-	if (result != NULL)
-		kfree(result);
+	kfree(result);
 	return NULL;
 }

@@ -266,8 +265,7 @@ static struct vector_fds *user_init_hybrid_fds(struct arglist *ifspec)
 	return result;
 hybrid_cleanup:
 	printk(UM_KERN_ERR "user_init_hybrid: init failed");
-	if (result != NULL)
-		kfree(result);
+	kfree(result);
 	return NULL;
 }

@@ -344,10 +342,8 @@ static struct vector_fds *user_init_unix_fds(struct arglist *ifspec, int id)
 unix_cleanup:
 	if (fd >= 0)
 		os_close_file(fd);
-	if (remote_addr != NULL)
-		kfree(remote_addr);
-	if (result != NULL)
-		kfree(result);
+	kfree(remote_addr);
+	kfree(result);
 	return NULL;
 }

@@ -382,8 +378,7 @@ static struct vector_fds *user_init_raw_fds(struct arglist *ifspec)
 	return result;
 raw_cleanup:
 	printk(UM_KERN_ERR "user_init_raw: init failed, error %d", err);
-	if (result != NULL)
-		kfree(result);
+	kfree(result);
 	return NULL;
 }

--
2.26.0