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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-09-17 03:51:27 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-09-17 03:51:27 +0400
commit8f949b9a7e0bac3a9c3c29dc27c476a87e21db3e (patch)
tree88cd7852d59ebae54fcc2f57019ea13284042962 /drivers/usb/host/ehci-q.c
parent6f586e663e3b3674cadad0d5329424b006a0a289 (diff)
parent5698bd757d55b1bb87edd1a9744ab09c142abfc2 (diff)
downloadlinux-8f949b9a7e0bac3a9c3c29dc27c476a87e21db3e.tar.xz
Merge 3.6-rc7 into driver-core-next
This pulls in the fixes in that branch that are needed here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci-q.c')
-rw-r--r--drivers/usb/host/ehci-q.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 9bc39ca460c8..4b66374bdc8e 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -128,9 +128,17 @@ qh_refresh (struct ehci_hcd *ehci, struct ehci_qh *qh)
else {
qtd = list_entry (qh->qtd_list.next,
struct ehci_qtd, qtd_list);
- /* first qtd may already be partially processed */
- if (cpu_to_hc32(ehci, qtd->qtd_dma) == qh->hw->hw_current)
+ /*
+ * first qtd may already be partially processed.
+ * If we come here during unlink, the QH overlay region
+ * might have reference to the just unlinked qtd. The
+ * qtd is updated in qh_completions(). Update the QH
+ * overlay here.
+ */
+ if (cpu_to_hc32(ehci, qtd->qtd_dma) == qh->hw->hw_current) {
+ qh->hw->hw_qtd_next = qtd->hw_next;
qtd = NULL;
+ }
}
if (qtd)