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USB: fix a bug in the scatter-gather library 

This patch (as1298) fixes a bug in the new scatter-gather URB
facility.  If an URB uses a scatterlist then it should not have the
URB_NO_INTERRUPT flag set; otherwise the system won't be notified when
the transfer completes.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: David Vrabel <david.vrabel@csr.com>
CC: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2009-10-27 15:26:50 -04:00 committed by Greg Kroah-Hartman
parent 253e05724f
commit ed1db3ada1
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/core/message.c
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@ -403,7 +403,7 @@ int usb_sg_init(struct usb_sg_request *io, struct usb_device *dev,
if (!io->urbs)
goto nomem;
urb_flags = URB_NO_INTERRUPT;
urb_flags = 0;
if (dma)
urb_flags |= URB_NO_TRANSFER_DMA_MAP;
if (usb_pipein(pipe))
@ -435,6 +435,7 @@ int usb_sg_init(struct usb_sg_request *io, struct usb_device *dev,
io->urbs[0]->num_sgs = io->entries;
io->entries = 1;
} else {
urb_flags |= URB_NO_INTERRUPT;
for_each_sg(sg, sg, io->entries, i) {
unsigned len;