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Date: Thu, 16 Mar 2017 23:30:17 +0900 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>, Mathias Nyman <mathias.nyman@...ux.intel.com> Subject: [PATCH 4.10 33/48] usb: host: xhci-plat: Fix timeout on removal of hot pluggable xhci controllers 4.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Guenter Roeck <linux@...ck-us.net> commit dcc7620cad5ad1326a78f4031a7bf4f0e5b42984 upstream. Upstream commit 98d74f9ceaef ("xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers") fixes a problem with hot pluggable PCI xhci controllers which can result in excessive timeouts, to the point where the system reports a deadlock. The same problem is seen with hot pluggable xhci controllers using the xhci-plat driver, such as the driver used for Type-C ports on rk3399. Similar to hot-pluggable PCI controllers, the driver for this chip removes the xhci controller from the system when the Type-C cable is disconnected. The solution for PCI devices works just as well for non-PCI devices and avoids the problem. Signed-off-by: Guenter Roeck <linux@...ck-us.net> Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/usb/host/xhci-plat.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -283,6 +283,8 @@ static int xhci_plat_remove(struct platf struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct clk *clk = xhci->clk; + xhci->xhc_state |= XHCI_STATE_REMOVING; + usb_remove_hcd(xhci->shared_hcd); usb_phy_shutdown(hcd->usb_phy);
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