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[PATCH] USB: fix usb-skeleton limit resource usage patch. 

Prevents a compiler warning and uses down_interruptible() instead of down() in
process context.

Signed-off-by: Sam Bishop <sam@bishop.dhs.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sam Bishop 2005-12-22 17:11:02 -07:00 committed by Greg Kroah-Hartman
parent cb5b3f6950
commit c8dd7709c5
1 changed files with 5 additions and 2 deletions
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7
drivers/usb/usb-skeleton.c
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@ -166,7 +166,7 @@ static ssize_t skel_write(struct file *file, const char *user_buffer, size_t cou
int retval = 0;
struct urb *urb = NULL;
char *buf = NULL;
size_t writesize = min(count, MAX_TRANSFER);
size_t writesize = min(count, (size_t)MAX_TRANSFER);
dev = (struct usb_skel *)file->private_data;
@ -175,7 +175,10 @@ static ssize_t skel_write(struct file *file, const char *user_buffer, size_t cou
goto exit;
/* limit the number of URBs in flight to stop a user from using up all RAM */
down (&dev->limit_sem);
if (down_interruptible(&dev->limit_sem)) {
retval = -ERESTARTSYS;
goto exit;
}
/* create a urb, and a buffer for it, and copy the data to the urb */
urb = usb_alloc_urb(0, GFP_KERNEL);