iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drivers: usb: core: Minimize irq disabling in usb_sg_cancel()

Browse Source 
Restructure usb_sg_cancel() so we don't have to disable interrupts
while cancelling the URBs.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: David Mosberger <davidm@egauge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Mosberger 2016-03-08 14:42:49 -07:00 committed by Greg Kroah-Hartman
parent 98b74b0ee5
commit 5f2e5fb873
1 changed files with 18 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/usb/core/message.c
View File

@ -577,31 +577,28 @@ EXPORT_SYMBOL_GPL(usb_sg_wait);
void usb_sg_cancel(struct usb_sg_request *io)
{
unsigned long flags;
int i, retval;
spin_lock_irqsave(&io->lock, flags);
/* shut everything down, if it didn't already */
if (!io->status) {
int i;
io->status = -ECONNRESET;
spin_unlock(&io->lock);
for (i = 0; i < io->entries; i++) {
int retval;
usb_block_urb(io->urbs[i]);
retval = usb_unlink_urb(io->urbs[i]);
if (retval != -EINPROGRESS
&& retval != -ENODEV
&& retval != -EBUSY
&& retval != -EIDRM)
dev_warn(&io->dev->dev, "%s, unlink --> %d\n",
__func__, retval);
}
spin_lock(&io->lock);
if (io->status) {
spin_unlock_irqrestore(&io->lock, flags);
return;
}
/* shut everything down */
io->status = -ECONNRESET;
spin_unlock_irqrestore(&io->lock, flags);
for (i = io->entries - 1; i >= 0; --i) {
usb_block_urb(io->urbs[i]);
retval = usb_unlink_urb(io->urbs[i]);
if (retval != -EINPROGRESS
&& retval != -ENODEV
&& retval != -EBUSY
&& retval != -EIDRM)
dev_warn(&io->dev->dev, "%s, unlink --> %d\n",
__func__, retval);
}
}
EXPORT_SYMBOL_GPL(usb_sg_cancel);