ChangeSet 1.1019.1.32, 2003/08/13 15:17:26-07:00, [EMAIL PROTECTED]
[PATCH] USB: bug in EHCI device reset through transaction
This supports another special case: devices can revert to the "default"
(address zero) state temporarily in usb_reset_device().
This is the quick fix; 2.6 could get rid of these special cases in ep0
hcd logic by disabling ep0, but 2.4 can't.
drivers/usb/host/ehci-q.c | 4 ++++
1 files changed, 4 insertions(+)
diff -Nru a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
--- a/drivers/usb/host/ehci-q.c Thu Aug 28 14:50:03 2003
+++ b/drivers/usb/host/ehci-q.c Thu Aug 28 14:50:03 2003
@@ -832,6 +832,10 @@
qh->hw_info1 = cpu_to_le32 (info);
}
}
+
+ /* usb_reset_device() briefly reverts to address 0 */
+ if (usb_pipedevice (urb->pipe) == 0)
+ qh->hw_info1 &= cpu_to_le32(~0x7f);
}
/* NOTE: changing config or interface setting is not
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