media: tm6000: cleanup trival coding style issues

- Delete seven error messages for a failed memory allocation
- Adjust seven checks for null pointers
- Use common error handling code in tm6000_usb_probe()
- Adjust jump targets so that the function "kfree" will be always called
  with a non-null pointer.
- Delete an initialisation for the local variable "dev"
  which became unnecessary with this refactoring.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 5 insertions, 12 deletions

diff --git a/drivers/media/usb/tm6000/tm6000-video.c b/drivers/media/usb/tm6000/tm6000-video.c
index ec8c4d2534dc..0d45f35e1697 100644
--- a/drivers/media/usb/tm6000/tm6000-video.c
+++ b/drivers/media/usb/tm6000/tm6000-video.c
@@ -470,20 +470,16 @@ static int tm6000_alloc_urb_buffers(struct tm6000_core *dev)
 	int num_bufs = TM6000_NUM_URB_BUF;
 	int i;
 
-	if (dev->urb_buffer != NULL)
+	if (dev->urb_buffer)
 		return 0;
 
 	dev->urb_buffer = kmalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
-	if (!dev->urb_buffer) {
-		tm6000_err("cannot allocate memory for urb buffers\n");
+	if (!dev->urb_buffer)
 		return -ENOMEM;
-	}
 
 	dev->urb_dma = kmalloc(sizeof(dma_addr_t *)*num_bufs, GFP_KERNEL);
-	if (!dev->urb_dma) {
-		tm6000_err("cannot allocate memory for urb dma pointers\n");
+	if (!dev->urb_dma)
 		return -ENOMEM;
-	}
 
 	for (i = 0; i < num_bufs; i++) {
 		dev->urb_buffer[i] = usb_alloc_coherent(
@@ -507,7 +503,7 @@ static int tm6000_free_urb_buffers(struct tm6000_core *dev)
 {
 	int i;
 
-	if (dev->urb_buffer == NULL)
+	if (!dev->urb_buffer)
 		return 0;
 
 	for (i = 0; i < TM6000_NUM_URB_BUF; i++) {
@@ -598,15 +594,12 @@ static int tm6000_prepare_isoc(struct tm6000_core *dev)
 	dev->isoc_ctl.num_bufs = num_bufs;
 
 	dev->isoc_ctl.urb = kmalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
-	if (!dev->isoc_ctl.urb) {
-		tm6000_err("cannot alloc memory for usb buffers\n");
+	if (!dev->isoc_ctl.urb)
 		return -ENOMEM;
-	}
 
 	dev->isoc_ctl.transfer_buffer = kmalloc(sizeof(void *)*num_bufs,
 				   GFP_KERNEL);
 	if (!dev->isoc_ctl.transfer_buffer) {
-		tm6000_err("cannot allocate memory for usbtransfer\n");
 		kfree(dev->isoc_ctl.urb);
 		return -ENOMEM;
 	}