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USB: EHCI: store reason for unlinking a QH

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This patch replaces the "exception" bitflag in the ehci_qh structure
with a more explicit "unlink_reason" bitmask.  This is for use in the
following patch, where we will need to have a good idea of the
reason for unlinking a QH, not just "something exceptional happened".

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Michael Reutman <mreutman@epiqsolutions.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alan Stern
2016-01-25 15:42:04 -05:00
committed by Greg Kroah-Hartman
parent 4f97f8f5f0
commit fcc5184ec1
5 changed files with 26 additions and 11 deletions
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drivers/usb/host/ehci-timer.c
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@@ -237,6 +237,7 @@ static void ehci_handle_start_intr_unlinks(struct ehci_hcd *ehci)
ehci->intr_unlink_wait_cycle))
break;
list_del_init(&qh->unlink_node);
qh->unlink_reason |= QH_UNLINK_QUEUE_EMPTY;
start_unlink_intr(ehci, qh);
}