This is a note to let you know that I've just added the patch titled
xhci: Fix resume issues on Renesas chips in Samsung laptops
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:
xhci-fix-resume-issues-on-renesas-chips-in-samsung-laptops.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 1aa9578c1a9450fb21501c4f549f5b1edb557e6d Mon Sep 17 00:00:00 2001
From: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
Date: Fri, 17 Jan 2014 15:38:12 -0800
Subject: xhci: Fix resume issues on Renesas chips in Samsung laptops
From: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
commit 1aa9578c1a9450fb21501c4f549f5b1edb557e6d upstream.
Don Zickus <dzickus@xxxxxxxxxx> writes:
Some co-workers of mine bought Samsung laptops that had mostly usb3 ports.
Those ports did not resume correctly (the driver would timeout communicating
and fail). This led to frustration as suspend/resume is a common use for
laptops.
Poking around, I applied the reset on resume quirk to this chipset and the
resume started working. Reloading the xhci_hcd module had been the temporary
workaround.
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
Reported-by: Don Zickus <dzickus@xxxxxxxxxx>
Tested-by: Prarit Bhargava <prarit@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-pci.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -109,6 +109,11 @@ static void xhci_pci_quirks(struct devic
xhci_dbg(xhci, "QUIRK: Resetting on resume\n");
xhci->quirks |= XHCI_TRUST_TX_LENGTH;
}
+ if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
+ pdev->device == 0x0015 &&
+ pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG &&
+ pdev->subsystem_device == 0xc0cd)
+ xhci->quirks |= XHCI_RESET_ON_RESUME;
if (pdev->vendor == PCI_VENDOR_ID_VIA)
xhci->quirks |= XHCI_RESET_ON_RESUME;
}
Patches currently in stable-queue which might be from sarah.a.sharp@xxxxxxxxxxxxxxx are
queue-3.4/xhci-fix-resume-issues-on-renesas-chips-in-samsung-laptops.patch
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