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authorSarah Sharp <sarah.a.sharp@linux.intel.com>2010-10-21 11:14:54 -0700
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2011-03-13 18:07:14 -0700
commit23e0d1066f429ab44305e96fbff13f1793886277 (patch)
tree39421fefa903781b6f219b041bfbaec783027ddd /drivers
parent8766c815607e572556b04075d4545330123c4f27 (diff)
downloadop-kernel-dev-23e0d1066f429ab44305e96fbff13f1793886277.zip
op-kernel-dev-23e0d1066f429ab44305e96fbff13f1793886277.tar.gz
usb: Refactor irq enabling out of usb_add_hcd()
Refactor out the code in usb_add_hcd() to request the IRQ line for the HCD. This will only need to be called once for the two xHCI roothubs, so it's easier to refactor it into a function, rather than wrapping the long if-else block into another if statement. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/core/hcd.c75
1 files changed, 43 insertions, 32 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 93c0b92..40c7a46 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2236,6 +2236,46 @@ void usb_put_hcd (struct usb_hcd *hcd)
}
EXPORT_SYMBOL_GPL(usb_put_hcd);
+static int usb_hcd_request_irqs(struct usb_hcd *hcd,
+ unsigned int irqnum, unsigned long irqflags)
+{
+ int retval;
+
+ if (hcd->driver->irq) {
+
+ /* IRQF_DISABLED doesn't work as advertised when used together
+ * with IRQF_SHARED. As usb_hcd_irq() will always disable
+ * interrupts we can remove it here.
+ */
+ if (irqflags & IRQF_SHARED)
+ irqflags &= ~IRQF_DISABLED;
+
+ snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d",
+ hcd->driver->description, hcd->self.busnum);
+ retval = request_irq(irqnum, &usb_hcd_irq, irqflags,
+ hcd->irq_descr, hcd);
+ if (retval != 0) {
+ dev_err(hcd->self.controller,
+ "request interrupt %d failed\n",
+ irqnum);
+ return retval;
+ }
+ hcd->irq = irqnum;
+ dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum,
+ (hcd->driver->flags & HCD_MEMORY) ?
+ "io mem" : "io base",
+ (unsigned long long)hcd->rsrc_start);
+ } else {
+ hcd->irq = -1;
+ if (hcd->rsrc_start)
+ dev_info(hcd->self.controller, "%s 0x%08llx\n",
+ (hcd->driver->flags & HCD_MEMORY) ?
+ "io mem" : "io base",
+ (unsigned long long)hcd->rsrc_start);
+ }
+ return 0;
+}
+
/**
* usb_add_hcd - finish generic HCD structure initialization and register
* @hcd: the usb_hcd structure to initialize
@@ -2317,38 +2357,9 @@ int usb_add_hcd(struct usb_hcd *hcd,
dev_dbg(hcd->self.controller, "supports USB remote wakeup\n");
/* enable irqs just before we start the controller */
- if (hcd->driver->irq) {
-
- /* IRQF_DISABLED doesn't work as advertised when used together
- * with IRQF_SHARED. As usb_hcd_irq() will always disable
- * interrupts we can remove it here.
- */
- if (irqflags & IRQF_SHARED)
- irqflags &= ~IRQF_DISABLED;
-
- snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d",
- hcd->driver->description, hcd->self.busnum);
- retval = request_irq(irqnum, &usb_hcd_irq, irqflags,
- hcd->irq_descr, hcd);
- if (retval != 0) {
- dev_err(hcd->self.controller,
- "request interrupt %d failed\n",
- irqnum);
- goto err_request_irq;
- }
- hcd->irq = irqnum;
- dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum,
- (hcd->driver->flags & HCD_MEMORY) ?
- "io mem" : "io base",
- (unsigned long long)hcd->rsrc_start);
- } else {
- hcd->irq = -1;
- if (hcd->rsrc_start)
- dev_info(hcd->self.controller, "%s 0x%08llx\n",
- (hcd->driver->flags & HCD_MEMORY) ?
- "io mem" : "io base",
- (unsigned long long)hcd->rsrc_start);
- }
+ retval = usb_hcd_request_irqs(hcd, irqnum, irqflags);
+ if (retval)
+ goto err_request_irq;
hcd->state = HC_STATE_RUNNING;
retval = hcd->driver->start(hcd);
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