This is a note to let you know that I've just added the patch titled
Revert "USB: EHCI: don't check DMA values in QH overlays"
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
revert-usb-ehci-don-t-check-dma-values-in-qh-overlays.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed Mar 20 14:16:12 PDT 2013
Date: Wed, 20 Mar 2013 14:16:12 -0700
To: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Subject: Revert "USB: EHCI: don't check DMA values in QH overlays"
This reverts commit 0319f9909ce68a7516dfc8d53400e07168d281a8, which is commit
feca7746d5d9e84b105a613b7f3b6ad00d327372 upstream.
It shouldn't have gone into this stable release.
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>
Cc: Stephen Thirlwall <sdt@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/ehci-q.c | 18 +++++-------------
1 file changed, 5 insertions(+), 13 deletions(-)
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -135,7 +135,7 @@ qh_refresh (struct ehci_hcd *ehci, struc
* qtd is updated in qh_completions(). Update the QH
* overlay here.
*/
- if (qh->hw->hw_token & ACTIVE_BIT(ehci)) {
+ if (cpu_to_hc32(ehci, qtd->qtd_dma) == qh->hw->hw_current) {
qh->hw->hw_qtd_next = qtd->hw_next;
qtd = NULL;
}
@@ -459,19 +459,11 @@ qh_completions (struct ehci_hcd *ehci, s
else if (last_status == -EINPROGRESS && !urb->unlinked)
continue;
- /*
- * If this was the active qtd when the qh was unlinked
- * and the overlay's token is active, then the overlay
- * hasn't been written back to the qtd yet so use its
- * token instead of the qtd's. After the qtd is
- * processed and removed, the overlay won't be valid
- * any more.
- */
- if (state == QH_STATE_IDLE &&
- qh->qtd_list.next == &qtd->qtd_list &&
- (hw->hw_token & ACTIVE_BIT(ehci))) {
+ /* qh unlinked; token in overlay may be most current */
+ if (state == QH_STATE_IDLE
+ && cpu_to_hc32(ehci, qtd->qtd_dma)
+ == hw->hw_current) {
token = hc32_to_cpu(ehci, hw->hw_token);
- hw->hw_token &= ~ACTIVE_BIT(ehci);
/* An unlink may leave an incomplete
* async transaction in the TT buffer.
Patches currently in stable-queue which might be from gregkh@xxxxxxxxxxxxxxxxxxx are
queue-3.4/revert-usb-ehci-don-t-check-dma-values-in-qh-overlays.patch
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