linux-kernel - [PATCH] usb: Fix linker errors with CONFIG

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Date:	Fri, 15 Oct 2010 14:59:15 -0700
From:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
To:	Greg KH <gregkh@...e.de>
Cc:	Randy Dunlap <randy.dunlap@...cle.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	lud <linux-usb@...r.kernel.org>, Andiry Xu <andiry.xu@....com>,
	Dong Nguyen <dong.nguyen@....com>,
	Libin Yang <libin.yang@....com>
Subject: [PATCH] usb: Fix linker errors with CONFIG_PM=n

Fix these linker errors when CONFIG_PM=n:

ERROR: "xhci_bus_resume" [drivers/usb/host/xhci-hcd.ko] undefined!
ERROR: "xhci_bus_suspend" [drivers/usb/host/xhci-hcd.ko] undefined!

Reported-by: Randy Dunlap <randy.dunlap@...cle.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@...ux.intel.com>
---

Randy, this should fix your linker errors.  Without the patch, I get the
same errors, and with the patch I don't.

Greg, this applies on top of the previous patch.

 drivers/usb/host/xhci-hub.c |    7 +------
 drivers/usb/host/xhci.c     |    6 ------
 drivers/usb/host/xhci.h     |   14 ++++++++++++++
 3 files changed, 15 insertions(+), 12 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 7f2f63c..fef5a1f 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -742,9 +742,4 @@ int xhci_bus_resume(struct usb_hcd *hcd)
 	return 0;
 }
 
-#else
-
-#define	xhci_bus_suspend	NULL
-#define	xhci_bus_resume		NULL
-
-#endif
+#endif	/* CONFIG_PM */
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 9dc5be5..5d7d4e9 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -761,12 +761,6 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 	spin_unlock_irq(&xhci->lock);
 	return 0;
 }
-
-#else
-
-#define	xhci_suspend	NULL
-#define	xhci_resume	NULL
-
 #endif	/* CONFIG_PM */
 
 /*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index c08928a..93d3bf4 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1405,8 +1405,15 @@ int xhci_init(struct usb_hcd *hcd);
 int xhci_run(struct usb_hcd *hcd);
 void xhci_stop(struct usb_hcd *hcd);
 void xhci_shutdown(struct usb_hcd *hcd);
+
+#ifdef	CONFIG_PM
 int xhci_suspend(struct xhci_hcd *xhci);
 int xhci_resume(struct xhci_hcd *xhci, bool hibernated);
+#else
+#define	xhci_suspend	NULL
+#define	xhci_resume	NULL
+#endif
+
 int xhci_get_frame(struct usb_hcd *hcd);
 irqreturn_t xhci_irq(struct usb_hcd *hcd);
 irqreturn_t xhci_msi_irq(int irq, struct usb_hcd *hcd);
@@ -1481,8 +1488,15 @@ void xhci_ring_ep_doorbell(struct xhci_hcd *xhci, unsigned int slot_id,
 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);
+
+#ifdef CONFIG_PM
 int xhci_bus_suspend(struct usb_hcd *hcd);
 int xhci_bus_resume(struct usb_hcd *hcd);
+#else
+#define	xhci_bus_suspend	NULL
+#define	xhci_bus_resume		NULL
+#endif	/* CONFIG_PM */
+
 u32 xhci_port_state_to_neutral(u32 state);
 int xhci_find_slot_id_by_port(struct xhci_hcd *xhci, u16 port);
 void xhci_ring_device(struct xhci_hcd *xhci, int slot_id);
-- 
1.6.3.3

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