| Date | Wed, 09 Nov 2011 13:28:23 -0800 | From | Greg KH <> | Subject | [181/262] xHCI: test and clear RWC bit |
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3.0-stable review patch. If anyone has any objections, please let me know.
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From: Andiry Xu <andiry.xu@amd.com>
commit d2f52c9e585bbb1a3c164e02b8dcd0d996c67353 upstream.
Introduce xhci_test_and_clear_bit() to clear RWC bit in PORTSC register.
Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/usb/host/xhci-hub.c | 22 ++++++++++++++++------ drivers/usb/host/xhci-ring.c | 6 ++---- drivers/usb/host/xhci.h | 2 ++ 3 files changed, 20 insertions(+), 10 deletions(-)
--- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -392,6 +392,20 @@ static int xhci_get_ports(struct usb_hcd return max_ports; } +/* Test and clear port RWC bit */ +void xhci_test_and_clear_bit(struct xhci_hcd *xhci, __le32 __iomem **port_array, + int port_id, u32 port_bit) +{ + u32 temp; + + temp = xhci_readl(xhci, port_array[port_id]); + if (temp & port_bit) { + temp = xhci_port_state_to_neutral(temp); + temp |= port_bit; + xhci_writel(xhci, temp, port_array[port_id]); + } +} + int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength) { @@ -938,12 +952,8 @@ int xhci_bus_resume(struct usb_hcd *hcd) spin_lock_irqsave(&xhci->lock, flags); /* Clear PLC */ - temp = xhci_readl(xhci, port_array[port_index]); - if (temp & PORT_PLC) { - temp = xhci_port_state_to_neutral(temp); - temp |= PORT_PLC; - xhci_writel(xhci, temp, port_array[port_index]); - } + xhci_test_and_clear_bit(xhci, port_array, port_index, + PORT_PLC); slot_id = xhci_find_slot_id_by_port(hcd, xhci, port_index + 1); --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1347,10 +1347,8 @@ static void handle_port_status(struct xh xhci_ring_device(xhci, slot_id); xhci_dbg(xhci, "resume SS port %d finished\n", port_id); /* Clear PORT_PLC */ - temp = xhci_readl(xhci, port_array[faked_port_index]); - temp = xhci_port_state_to_neutral(temp); - temp |= PORT_PLC; - xhci_writel(xhci, temp, port_array[faked_port_index]); + xhci_test_and_clear_bit(xhci, port_array, + faked_port_index, PORT_PLC); } else { xhci_dbg(xhci, "resume HS port %d\n", port_id); bus_state->resume_done[faked_port_index] = jiffies + --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1566,6 +1566,8 @@ void xhci_ring_ep_doorbell(struct xhci_h unsigned int ep_index, unsigned int stream_id); /* xHCI roothub code */ +void xhci_test_and_clear_bit(struct xhci_hcd *xhci, __le32 __iomem **port_array, + int port_id, u32 port_bit); int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength); int xhci_hub_status_data(struct usb_hcd *hcd, char *buf);
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