Messages in this thread | | | Subject | Re: call request_irq before or after hardware initialization? | From | Arjan van de Ven <> | Date | Fri, 29 Jun 2007 13:23:07 -0700 |
| |
On Fri, 2007-06-29 at 12:35 -0700, Li Juen Hwang wrote: > > Hi, > > Most 1394 drivers on Linux, ohci1394 for instance, calls > request_irq() before > initializing/enabling hardware chip. I'd like to reverse the order > so that driver > can exit the kernel without calling free_irq() if hardware failed. > Is that ok? > will it cause side effect? Thanks.
well you have to be able to handle interrupts the moment the hardware will generate them... so the request_irq has to happen before that point.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |