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authorAlan Stern <stern@rowland.harvard.edu>2013-03-22 13:31:11 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-03-25 13:35:05 -0700
commit7bc782d73c7db042ecc965866b8c1c2b7d6e93d6 (patch)
treefa5fcfb05da245b4b611585b36a9271c8144fd6b /drivers/usb/host/ehci.h
parent79bcf7b02ba3d45bafe81a2753cedb8ef49548e3 (diff)
USB: EHCI: split needs_rescan into two flags
This patch (as1662) does some more QH-related cleanup in ehci-hcd. The qh->needs_rescan flag is currently used for two different purposes; the patch replaces it with two separate flags for greater clarity: qh->dequeue_during_giveback indicates that a completion handler dequeued an URB (implying that a rescan is needed), and qh->exception indicates that the QH is in an exceptional state requiring an unlink (either it encountered an I/O error or an unlink was requested). The new flags get set where the dequeue, exception, or unlink request occurred, rather than where the unlink is started. This is so that in the future, if we need to, we will be able to tell apart unlinks that truly were required from those that were carried out merely because the QH wasn't being used. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci.h')
-rw-r--r--drivers/usb/host/ehci.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 36c3a8210595..6815209511aa 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -384,7 +384,6 @@ struct ehci_qh {
unsigned unlink_cycle;
- u8 needs_rescan; /* Dequeue during giveback */
u8 qh_state;
#define QH_STATE_LINKED 1 /* HC sees this */
#define QH_STATE_UNLINK 2 /* HC may still see this */
@@ -407,6 +406,9 @@ struct ehci_qh {
struct usb_device *dev; /* access to TT */
unsigned is_out:1; /* bulk or intr OUT */
unsigned clearing_tt:1; /* Clear-TT-Buf in progress */
+ unsigned dequeue_during_giveback:1;
+ unsigned exception:1; /* got a fault, or an unlink
+ was requested */
};
/*-------------------------------------------------------------------------*/