[PATCH 18/25] usb: xhci: add PORTPMSC variable to xhci_hub_control()

[Mathias Nyman <mathias.nyman@linux.intel.com>]

From: Niklas Neronin <niklas.neronin@linux.intel.com>

The code handling U1/U2 timeout updates reads and modifies the PORTPMSC
register using the generic 'temp' variable, which is also used for
PORTSC. This makes the code hard to read and increases the risk of mixing
up register contents.

Introduce a dedicated 'portpmsc' variable for PORTPMSC accesses and use
it in both U1 and U2 timeout handlers. This makes the intent clearer and
keeps register operations logically separated.

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
---
 drivers/usb/host/xhci-hub.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 7fb17799cfdc..4da3b48dfce0 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -1202,7 +1202,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
 	int max_ports;
 	unsigned long flags;
-	u32 temp, status;
+	u32 temp, portpmsc, status;
 	int retval = 0;
 	struct xhci_bus_state *bus_state;
 	u16 link_state;
@@ -1508,20 +1508,20 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 				goto error;
 
 			timeout = (wIndex & 0xff00) >> 8;
-			temp = readl(&port->port_reg->portpmsc);
-			temp &= ~PORT_U1_TIMEOUT_MASK;
-			temp |= PORT_U1_TIMEOUT(timeout);
-			writel(temp, &port->port_reg->portpmsc);
+			portpmsc = readl(&port->port_reg->portpmsc);
+			portpmsc &= ~PORT_U1_TIMEOUT_MASK;
+			portpmsc |= PORT_U1_TIMEOUT(timeout);
+			writel(portpmsc, &port->port_reg->portpmsc);
 			break;
 		case USB_PORT_FEAT_U2_TIMEOUT:
 			if (hcd->speed < HCD_USB3)
 				goto error;
 
 			timeout = (wIndex & 0xff00) >> 8;
-			temp = readl(&port->port_reg->portpmsc);
-			temp &= ~PORT_U2_TIMEOUT_MASK;
-			temp |= PORT_U2_TIMEOUT(timeout);
-			writel(temp, &port->port_reg->portpmsc);
+			portpmsc = readl(&port->port_reg->portpmsc);
+			portpmsc &= ~PORT_U2_TIMEOUT_MASK;
+			portpmsc |= PORT_U2_TIMEOUT(timeout);
+			writel(portpmsc, &port->port_reg->portpmsc);
 			break;
 		case USB_PORT_FEAT_TEST:
 			/* 4.19.6 Port Test Modes (USB2 Test Mode) */
-- 
2.43.0