USB: ehci: handle large bulk URBs correctly (again)
authorMisha Zhilin <misha@epiphan.com>
Thu, 28 Feb 2008 02:05:24 +0000 (18:05 -0800)
committerGreg Kroah-Hartman <gregkh@suse.de>
Tue, 4 Mar 2008 22:57:43 +0000 (14:57 -0800)
commitb5f7a0ec11694e60c99d682549dfaf8a03d7ad97
tree44d0ebd86e84422296bb512f78722b507d092409
parent14f3546f32d69adaa303b72e5a999e85abe83f9a
USB: ehci: handle large bulk URBs correctly (again)

USB: ehci: Fixes completion for multi-qtd URB the short read case

When use of urb->status in the EHCI driver was reworked last August
(commit 14c04c0f88f228fee1f412be91d6edcb935c78aa), a bug was inserted
in the handling of early completion for bulk transactions that need
more than one qTD (e.g. more than 20KB in one URB).

This patch resolves that problem by ensuring that the early completion
status is preserved until the URB is handed back to its submitter,
instead of resetting it after each qTD.

Signed-off-by: Misha Zhilin <misha@epiphan.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/host/ehci-q.c