Disabling IRQ #209

음... 아마 USB허브를 쓰고 있어서 공유하는 프로그램들끼리 충돌이 일어나는거 같습니다.

구글에서 찾아봐도 순 영어로 되어 있어갖고 무슨말인지 모르겠습니다만 원문을 붙여드리겠습니다.

@_@

[PATCH 1/5] USB: Make usb_hcd_irq work for multi-role USB controllers w/ shared irq
Grant Likely grant.likely at secretlab.ca
Sat Nov 24 11:24:31 EST 2007

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--------------------------------------------------------------------------------

From: Peter Korsgaard

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
Signed-off-by: Grant Likely
---

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,

주소는 http://ozlabs.org/pipermail/linuxppc-dev/2007-November/046796.html

여기구요 그나마 이게 가장 정확도가 높은듯하네요... 좀 읽어보고 방법을 강구하던지 해야디..쩝

에러 발생시간이 약간 길어지긴 했는데 여전히 같은 문제는 있네요