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| author | Alan Stern <stern@rowland.harvard.edu> | 2009-07-31 10:41:40 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-08-07 16:05:13 -0700 |
| commit | ef4638f955f2c4a667c8af20769d03f5ed3781ca (patch) | |
| tree | 1e6092e6b104560ad1f079993dfd45fbf33df3d4 | |
| parent | 7a0f0d951273eee889c2441846842348ebc00a2a (diff) | |
| download | op-kernel-dev-ef4638f955f2c4a667c8af20769d03f5ed3781ca.zip op-kernel-dev-ef4638f955f2c4a667c8af20769d03f5ed3781ca.tar.gz | |
USB: EHCI: fix counting of transaction error retries
This patch (as1274) simplifies the counting of transaction-error
retries. Now we will count up from 0 to QH_XACTERR_MAX instead of
down from QH_XACTERR_MAX to 0.
The patch also fixes a small bug: qh->xacterr was not getting
initialized for interrupt endpoints.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Matthijs Kooijman <matthijs@stdin.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/host/ehci-q.c | 9 | ||||
| -rw-r--r-- | drivers/usb/host/ehci-sched.c | 1 |
2 files changed, 5 insertions, 5 deletions
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c index b273805..7673554 100644 --- a/drivers/usb/host/ehci-q.c +++ b/drivers/usb/host/ehci-q.c @@ -375,12 +375,11 @@ qh_completions (struct ehci_hcd *ehci, struct ehci_qh *qh) */ if ((token & QTD_STS_XACT) && QTD_CERR(token) == 0 && - --qh->xacterrs > 0 && + ++qh->xacterrs < QH_XACTERR_MAX && !urb->unlinked) { ehci_dbg(ehci, "detected XactErr len %zu/%zu retry %d\n", - qtd->length - QTD_LENGTH(token), qtd->length, - QH_XACTERR_MAX - qh->xacterrs); + qtd->length - QTD_LENGTH(token), qtd->length, qh->xacterrs); /* reset the token in the qtd and the * qh overlay (which still contains @@ -494,7 +493,7 @@ halt: last = qtd; /* reinit the xacterr counter for the next qtd */ - qh->xacterrs = QH_XACTERR_MAX; + qh->xacterrs = 0; } /* last urb's completion might still need calling */ @@ -941,7 +940,7 @@ static void qh_link_async (struct ehci_hcd *ehci, struct ehci_qh *qh) head->hw_next = dma; qh_get(qh); - qh->xacterrs = QH_XACTERR_MAX; + qh->xacterrs = 0; qh->qh_state = QH_STATE_LINKED; /* qtd completions reported later by interrupt */ } diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c index 74f7f83..edd61ee 100644 --- a/drivers/usb/host/ehci-sched.c +++ b/drivers/usb/host/ehci-sched.c @@ -542,6 +542,7 @@ static int qh_link_periodic (struct ehci_hcd *ehci, struct ehci_qh *qh) } } qh->qh_state = QH_STATE_LINKED; + qh->xacterrs = 0; qh_get (qh); /* update per-qh bandwidth for usbfs */ |
