linux-kernel - [PATCH v2 09/11] parport: change style of NULL comparison

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Date:	Wed, 28 Oct 2015 14:41:38 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	gregkh@...uxfoundation.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH v2 09/11] parport: change style of NULL comparison

checkpatch was complaining about NULL comparisons.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---
 drivers/parport/share.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/parport/share.c b/drivers/parport/share.c
index 441333b..ccd7df4 100644
--- a/drivers/parport/share.c
+++ b/drivers/parport/share.c
@@ -738,11 +738,11 @@ parport_register_device(struct parport *port, const char *name,
 	parport_get_port (port);
 
 	tmp = kmalloc(sizeof(struct pardevice), GFP_KERNEL);
-	if (tmp == NULL)
+	if (!tmp)
 		goto out;
 
 	tmp->state = kmalloc(sizeof(struct parport_state), GFP_KERNEL);
-	if (tmp->state == NULL)
+	if (!tmp->state)
 		goto out_free_pardevice;
 
 	tmp->name = name;
@@ -971,7 +971,7 @@ void parport_unregister_device(struct pardevice *dev)
 	struct parport *port;
 
 #ifdef PARPORT_PARANOID
-	if (dev == NULL) {
+	if (!dev) {
 		printk(KERN_ERR "parport_unregister_device: passed NULL\n");
 		return;
 	}
@@ -1345,7 +1345,7 @@ void parport_release(struct pardevice *dev)
 	 * interested in being woken up. (Note: no locking required)
 	 */
 	/* !!! LOCKING IS NEEDED HERE */
-	for (pd = port->devices; (port->cad == NULL) && pd; pd = pd->next) {
+	for (pd = port->devices; !port->cad && pd; pd = pd->next) {
 		if (pd->wakeup && pd != dev)
 			pd->wakeup(pd->private);
 	}
-- 
1.9.1

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