Re: rudimentary ISR question

[Krishna Kumar <kumarkr@xxxxxxxxxx>]

I think it is because the interrupt routine can be called as dev->poll_controller()
and race with real interrupts.

- KK

Steve Modica <modica@xxxxxxx>

Steve Modica <modica@xxxxxxx> Sent by: netdev-bounce@xxxxxxxxxxx 04/12/2004 03:16 PM

To: netdev@xxxxxxxxxxx cc: Subject: rudimentary ISR question

Hi All,

I'm looking at the tg3.c driver in the 2.4.21 kernel and in the
_interrupt routing, the driver is calling spin_lock_irqsave.

Since it's guaranteed that the tg3 interrupt handler will be disabled
for the duration of the interrupt handler, why can't the driver simply
call spin_lock?

Steve