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Message-Id: <20150831212654.F4280929@viggo.jf.intel.com>
Date: Mon, 31 Aug 2015 14:26:54 -0700
From: Dave Hansen <dave@...1.net>
To: dave@...1.net
Cc: dave.hansen@...ux.intel.com, mathias.nyman@...el.com,
gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] xhci: fix warning when CONFIG_PM disabled.
From: Dave Hansen <dave.hansen@...ux.intel.com>
I have a .config with CONFIG_PM disabled. I get the following
whenever compiling the xhci driver:
drivers/usb/host/xhci-pci.c:192:13: warning: ‘xhci_pme_quirk’ defined but not used [-Wunused-function]
Looks like we just need to move xhci_pme_quirk() to be underneath
the CONFIG_PM #ifdef.
Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Mathias Nyman <mathias.nyman@...el.com> (supporter:USB XHCI DRIVER)
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> (supporter:USB SUBSYSTEM)
Cc: linux-usb@...r.kernel.org (open list:USB XHCI DRIVER)
Cc: linux-kernel@...r.kernel.org (open list)
---
b/drivers/usb/host/xhci-pci.c | 90 +++++++++++++++++++++---------------------
1 file changed, 45 insertions(+), 45 deletions(-)
diff -puN drivers/usb/host/xhci-pci.c~xhci-warning drivers/usb/host/xhci-pci.c
--- a/drivers/usb/host/xhci-pci.c~xhci-warning 2015-08-31 14:16:40.553236125 -0700
+++ b/drivers/usb/host/xhci-pci.c 2015-08-31 14:17:41.140001370 -0700
@@ -180,51 +180,6 @@ static void xhci_pci_quirks(struct devic
"QUIRK: Resetting on resume");
}
-/*
- * In some Intel xHCI controllers, in order to get D3 working,
- * through a vendor specific SSIC CONFIG register at offset 0x883c,
- * SSIC PORT need to be marked as "unused" before putting xHCI
- * into D3. After D3 exit, the SSIC port need to be marked as "used".
- * Without this change, xHCI might not enter D3 state.
- * Make sure PME works on some Intel xHCI controllers by writing 1 to clear
- * the Internal PME flag bit in vendor specific PMCTRL register at offset 0x80a4
- */
-static void xhci_pme_quirk(struct usb_hcd *hcd, bool suspend)
-{
- struct xhci_hcd *xhci = hcd_to_xhci(hcd);
- struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
- u32 val;
- void __iomem *reg;
-
- if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
- pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI) {
-
- reg = (void __iomem *) xhci->cap_regs + PORT2_SSIC_CONFIG_REG2;
-
- /* Notify SSIC that SSIC profile programming is not done */
- val = readl(reg) & ~PROG_DONE;
- writel(val, reg);
-
- /* Mark SSIC port as unused(suspend) or used(resume) */
- val = readl(reg);
- if (suspend)
- val |= SSIC_PORT_UNUSED;
- else
- val &= ~SSIC_PORT_UNUSED;
- writel(val, reg);
-
- /* Notify SSIC that SSIC profile programming is done */
- val = readl(reg) | PROG_DONE;
- writel(val, reg);
- readl(reg);
- }
-
- reg = (void __iomem *) xhci->cap_regs + 0x80a4;
- val = readl(reg);
- writel(val | BIT(28), reg);
- readl(reg);
-}
-
#ifdef CONFIG_ACPI
static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev)
{
@@ -345,6 +300,51 @@ static void xhci_pci_remove(struct pci_d
}
#ifdef CONFIG_PM
+/*
+ * In some Intel xHCI controllers, in order to get D3 working,
+ * through a vendor specific SSIC CONFIG register at offset 0x883c,
+ * SSIC PORT need to be marked as "unused" before putting xHCI
+ * into D3. After D3 exit, the SSIC port need to be marked as "used".
+ * Without this change, xHCI might not enter D3 state.
+ * Make sure PME works on some Intel xHCI controllers by writing 1 to clear
+ * the Internal PME flag bit in vendor specific PMCTRL register at offset 0x80a4
+ */
+static void xhci_pme_quirk(struct usb_hcd *hcd, bool suspend)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
+ u32 val;
+ void __iomem *reg;
+
+ if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
+ pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI) {
+
+ reg = (void __iomem *) xhci->cap_regs + PORT2_SSIC_CONFIG_REG2;
+
+ /* Notify SSIC that SSIC profile programming is not done */
+ val = readl(reg) & ~PROG_DONE;
+ writel(val, reg);
+
+ /* Mark SSIC port as unused(suspend) or used(resume) */
+ val = readl(reg);
+ if (suspend)
+ val |= SSIC_PORT_UNUSED;
+ else
+ val &= ~SSIC_PORT_UNUSED;
+ writel(val, reg);
+
+ /* Notify SSIC that SSIC profile programming is done */
+ val = readl(reg) | PROG_DONE;
+ writel(val, reg);
+ readl(reg);
+ }
+
+ reg = (void __iomem *) xhci->cap_regs + 0x80a4;
+ val = readl(reg);
+ writel(val | BIT(28), reg);
+ readl(reg);
+}
+
static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
_
--
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