From: Peter Korsgaard <[EMAIL PROTECTED]> Some multi-role (host/peripheral) USB controllers use a shared interrupt line for all parts of the chip. Export usb_hcd_irq so drivers can call it from their interrupt handler instead of duplicating code. Drivers pass an irqnum of 0 to usb_add_hcd to signal that the interrupt handler shouldn't be registerred by the core.
Signed-off-by: Peter Korsgaard <[EMAIL PROTECTED]> Signed-off-by: Grant Likely <[EMAIL PROTECTED]> --- drivers/usb/core/hcd.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index fea8256..6ce305c 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1562,6 +1562,7 @@ irqreturn_t usb_hcd_irq (int irq, void *__hcd) usb_hc_died (hcd); return IRQ_HANDLED; } +EXPORT_SYMBOL_GPL (usb_hcd_irq); /*-------------------------------------------------------------------------*/ @@ -1670,6 +1671,9 @@ EXPORT_SYMBOL (usb_put_hcd); * Finish the remaining parts of generic HCD initialization: allocate the * buffers of consistent memory, register the bus, request the IRQ line, * and call the driver's reset() and start() routines. + * + * If irqnum is 0, the irq will not be requested. The caller is responsible + * for calling usb_hcd_irq at the correct time. */ int usb_add_hcd(struct usb_hcd *hcd, unsigned int irqnum, unsigned long irqflags) @@ -1723,7 +1727,7 @@ 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) { + if (hcd->driver->irq && irqnum) { snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", hcd->driver->description, hcd->self.busnum); if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev