Dear Sir/Madam,
We would like to request a quote for the below products:
UNITS DESCRIPTION
5 Ubiquiti airFiber AF24HD - wireless bridge
50 Seagate ST6000VXA01 Skyhawk 3.5 Hard Drive, 6TB, SATA 6Gb/s
50 Seagate ST4000VXA07 Skyhawk 3.5 Hard Drive, 4TB, SATA 6Gb/s
5 Microsoft 15" Multi-Touch Surface Book 3, Intel Core i7, 32 GB RAM - 1 TB SSD - En
We would also need to know if they are all in stock and if not, please advise on when products will be available to ship to us.
Payment per University Policy is net 30 days from date of invoice , payment terms should be clearly stated on your official quotation to know you accept our terms.
Looking forward to hearing back from you.
Cordially
Robert Bounds - Director Of Purchasing
Texas A&M University
purchasing(a)tamu-edu.com
robert.bounds(a)mailfence.com
Tel/Fax: (979) 272-5815
A xHC USB 3 port might miss the first wake signal from a USB 3 device
if the port LFPS reveiver isn't enabled fast enough after xHC resume.
xHC host will anyway be resumed by a PME# signal, but will go back to
suspend if no port activity is seen.
The device resends the U3 LFPS wake signal after a 100ms delay, but
by then host is already suspended, starting all over from the
beginning of this issue.
USB 3 specs say U3 wake LFPS signal is sent for max 10ms, then device
needs to delay 100ms before resending the wake.
Don't suspend immediately if port activity isn't detected in resume.
Instead add a retry. If there is no port activity then delay for 120ms,
and re-check for port activity.
Cc: <stable(a)vger.kernel.org>
Signed-off-by: Mathias Nyman <mathias.nyman(a)linux.intel.com>
---
drivers/usb/host/xhci.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index bd27bd670104..48a68fcf2b36 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1088,6 +1088,7 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
struct usb_hcd *secondary_hcd;
int retval = 0;
bool comp_timer_running = false;
+ bool pending_portevent = false;
if (!hcd->state)
return 0;
@@ -1226,13 +1227,22 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
done:
if (retval == 0) {
- /* Resume root hubs only when have pending events. */
- if (xhci_pending_portevent(xhci)) {
+ /*
+ * Resume roothubs only if there are pending events.
+ * USB 3 devices resend U3 LFPS wake after a 100ms delay if
+ * the first wake signalling failed, give it that chance.
+ */
+ pending_portevent = xhci_pending_portevent(xhci);
+ if (!pending_portevent) {
+ msleep(120);
+ pending_portevent = xhci_pending_portevent(xhci);
+ }
+
+ if (pending_portevent) {
usb_hcd_resume_root_hub(xhci->shared_hcd);
usb_hcd_resume_root_hub(hcd);
}
}
-
/*
* If system is subject to the Quirk, Compliance Mode Timer needs to
* be re-initialized Always after a system resume. Ports are subject
--
2.25.1