3.16.85-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: David Mosberger davidm@egauge.net
commit 5f2e5fb873e269fcb806165715d237f0de4ecf1d upstream.
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 Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/usb/core/message.c | 37 +++++++++++++++++-------------------- 1 file changed, 17 insertions(+), 20 deletions(-)
--- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -581,31 +581,28 @@ 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); + if (io->status) { + spin_unlock_irqrestore(&io->lock, flags); + return; + } + /* shut everything down */ + io->status = -ECONNRESET; + spin_unlock_irqrestore(&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]); + 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); - } - spin_lock(&io->lock); + 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_unlock_irqrestore(&io->lock, flags); } EXPORT_SYMBOL_GPL(usb_sg_cancel);