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authorAlan Stern <stern@rowland.harvard.edu>2009-10-27 15:26:50 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2009-12-11 11:55:18 -0800
commited1db3ada189c9af592c4d2971b22b482b68aafe (patch)
treeaa7d98261986c4558a7c38b9047ea9e02342b227 /drivers/usb/core
parent253e05724f9230910344357b1142ad8642ff9f5a (diff)
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>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/message.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 8d874cad658..adb9c8ee0c1 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -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;