Staging: go7007: small cleanup

small cleanup of go7007:

- prepare for urb->status conversion
- micro optimization
- use kzalloc
- fix free of memory in use in go7007_usb_disconnect

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Cc: Cohen <rcohen@snurgle.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/go7007/go7007-usb.c b/drivers/staging/go7007/go7007-usb.c
index f18eaa4..83eec92 100644 (file)
--- a/drivers/staging/go7007/go7007-usb.c
+++ b/drivers/staging/go7007/go7007-usb.c
@@ -680,9 +680,10 @@ static void go7007_usb_readinterrupt_complete(struct urb *urb)
 {
        struct go7007 *go = (struct go7007 *)urb->context;
        u16 *regs = (u16 *)urb->transfer_buffer;
+       int status = urb->status;
 
-       if (urb->status != 0) {
-               if (urb->status != -ESHUTDOWN &&
+       if (status) {
+               if (status != -ESHUTDOWN &&
                                go->status != STATUS_SHUTDOWN) {
                        printk(KERN_ERR
                                "go7007-usb: error in read interrupt: %d\n",
@@ -723,15 +724,14 @@ static int go7007_usb_read_interrupt(struct go7007 *go)
 static void go7007_usb_read_video_pipe_complete(struct urb *urb)
 {
        struct go7007 *go = (struct go7007 *)urb->context;
-       int r;
+       int r, status = urb-> status;
 
        if (!go->streaming) {
                wake_up_interruptible(&go->frame_waitq);
                return;
        }
-       if (urb->status != 0) {
-               printk(KERN_ERR "go7007-usb: error in video pipe: %d\n",
-                               urb->status);
+       if (status) {
+               printk(KERN_ERR "go7007-usb: error in video pipe: %d\n", status);
                return;
        }
        if (urb->actual_length != urb->transfer_buffer_length) {
@@ -747,13 +747,12 @@ static void go7007_usb_read_video_pipe_complete(struct urb *urb)
 static void go7007_usb_read_audio_pipe_complete(struct urb *urb)
 {
        struct go7007 *go = (struct go7007 *)urb->context;
-       int r;
+       int r, status = urb->status;
 
        if (!go->streaming)
                return;
-       if (urb->status != 0) {
-               printk(KERN_ERR "go7007-usb: error in audio pipe: %d\n",
-                               urb->status);
+       if (status) {
+               printk(KERN_ERR "go7007-usb: error in audio pipe: %d\n", status);
                return;
        }
        if (urb->actual_length != urb->transfer_buffer_length) {
@@ -794,7 +793,7 @@ static int go7007_usb_stream_start(struct go7007 *go)
        return 0;
 
 audio_submit_failed:
-       for (i = 0; i < 8; ++i)
+       for (i = 0; i < 7; ++i)
                usb_kill_urb(usb->audio_urbs[i]);
 video_submit_failed:
        for (i = 0; i < 8; ++i)
@@ -1019,10 +1018,9 @@ static int go7007_usb_probe(struct usb_interface *intf,
                return 0;
        }
 
-       usb = kmalloc(sizeof(struct go7007_usb), GFP_KERNEL);
+       usb = kzalloc(sizeof(struct go7007_usb), GFP_KERNEL);
        if (usb == NULL)
                return -ENOMEM;
-       memset(usb, 0, sizeof(struct go7007_usb));
 
        /* Allocate the URB and buffer for receiving incoming interrupts */
        usb->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
@@ -1227,6 +1225,7 @@ static void go7007_usb_disconnect(struct usb_interface *intf)
 {
        struct go7007 *go = usb_get_intfdata(intf);
        struct go7007_usb *usb = go->hpi_context;
+       struct urb *vurb, *aurb;
        int i;
 
        go->status = STATUS_SHUTDOWN;
@@ -1234,15 +1233,19 @@ static void go7007_usb_disconnect(struct usb_interface *intf)
 
        /* Free USB-related structs */
        for (i = 0; i < 8; ++i) {
-               if (usb->video_urbs[i] != NULL) {
-                       if (usb->video_urbs[i]->transfer_buffer != NULL)
-                               kfree(usb->video_urbs[i]->transfer_buffer);
-                       usb_free_urb(usb->video_urbs[i]);
+               vurb = usb->video_urbs[i];
+               if (vurb) {
+                       usb_kill_urb(vurb);
+                       if (vurb->transfer_buffer)
+                               kfree(vurb->transfer_buffer);
+                       usb_free_urb(vurb);
                }
-               if (usb->audio_urbs[i] != NULL) {
-                       if (usb->audio_urbs[i]->transfer_buffer != NULL)
-                               kfree(usb->audio_urbs[i]->transfer_buffer);
-                       usb_free_urb(usb->audio_urbs[i]);
+               aurb = usb->audio_urbs[i];
+               if (aurb) {
+                       usb_kill_urb(aurb);
+                       if (aurb->transfer_buffer)
+                               kfree(aurb->transfer_buffer);
+                       usb_free_urb(aurb);
                }
        }
        kfree(usb->intr_urb->transfer_buffer);