[PATCH 0/2] FireWire-nosy: Adjustments for three function implementations

[PATCH 0/2] FireWire-nosy: Adjustments for three function implementations

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 13 Feb 2018 19:30:19 +0100

Two update suggestions were taken into account
from static source code analysis.

Markus Elfring (2):
  Delete an error message for a failed memory allocation in add_card()
  Adjust eight checks for null pointers

 drivers/firewire/nosy.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

-- 
2.16.1

[PATCH 1/2] firewire: nosy: Delete an error message for a failed memory allocation in add_card()

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 13 Feb 2018 18:33:45 +0100

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/firewire/nosy.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/firewire/nosy.c b/drivers/firewire/nosy.c
index fee2e9e7ea20..6192f0718bf2 100644
--- a/drivers/firewire/nosy.c
+++ b/drivers/firewire/nosy.c
@@ -553,7 +553,6 @@ add_card(struct pci_dev *dev, const struct pci_device_id *unused)
 
 	lynx = kzalloc(sizeof *lynx, GFP_KERNEL);
 	if (lynx = NULL) {
-		dev_err(&dev->dev, "Failed to allocate control structure\n");
 		ret = -ENOMEM;
 		goto fail_disable;
 	}
-- 
2.16.1

[PATCH 2/2] firewire: nosy: Adjust eight checks for null pointers

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 13 Feb 2018 19:20:26 +0100
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The script “checkpatch.pl” pointed information out like the following.

Comparison to NULL could be written !…

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/firewire/nosy.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/firewire/nosy.c b/drivers/firewire/nosy.c
index 6192f0718bf2..0eaf79c625c6 100644
--- a/drivers/firewire/nosy.c
+++ b/drivers/firewire/nosy.c
@@ -128,7 +128,7 @@ static int
 packet_buffer_init(struct packet_buffer *buffer, size_t capacity)
 {
 	buffer->data = kmalloc(capacity, GFP_KERNEL);
-	if (buffer->data = NULL)
+	if (!buffer->data)
 		return -ENOMEM;
 	buffer->head = (struct packet *) buffer->data;
 	buffer->tail = (struct packet *) buffer->data;
@@ -287,11 +287,11 @@ nosy_open(struct inode *inode, struct file *file)
 			break;
 		}
 	mutex_unlock(&card_mutex);
-	if (lynx = NULL)
+	if (!lynx)
 		return -ENODEV;
 
 	client = kmalloc(sizeof *client, GFP_KERNEL);
-	if (client = NULL)
+	if (!client)
 		goto fail;
 
 	client->tcode_mask = ~0;
@@ -552,7 +552,7 @@ add_card(struct pci_dev *dev, const struct pci_device_id *unused)
 	pci_set_master(dev);
 
 	lynx = kzalloc(sizeof *lynx, GFP_KERNEL);
-	if (lynx = NULL) {
+	if (!lynx) {
 		ret = -ENOMEM;
 		goto fail_disable;
 	}
@@ -565,7 +565,7 @@ add_card(struct pci_dev *dev, const struct pci_device_id *unused)
 
 	lynx->registers = ioremap_nocache(pci_resource_start(dev, 0),
 					  PCILYNX_MAX_REGISTER);
-	if (lynx->registers = NULL) {
+	if (!lynx->registers) {
 		dev_err(&dev->dev, "Failed to map registers\n");
 		ret = -ENOMEM;
 		goto fail_deallocate_lynx;
@@ -577,9 +577,7 @@ add_card(struct pci_dev *dev, const struct pci_device_id *unused)
 				sizeof(struct pcl), &lynx->rcv_pcl_bus);
 	lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device,
 				RCV_BUFFER_SIZE, &lynx->rcv_buffer_bus);
-	if (lynx->rcv_start_pcl = NULL ||
-	    lynx->rcv_pcl = NULL ||
-	    lynx->rcv_buffer = NULL) {
+	if (!lynx->rcv_start_pcl || !lynx->rcv_pcl || !lynx->rcv_buffer) {
 		dev_err(&dev->dev, "Failed to allocate receive buffer\n");
 		ret = -ENOMEM;
 		goto fail_deallocate_buffers;
-- 
2.16.1