Ishizaki Kou wrote:
This patch solves a problem that the spidernet driver sometimes fails
to handle IRQ.
The problem happens because,
- In Cell architecture, interrupts may arrive at an interrupt
controller, even if they are masked by the setting on registers of
devices. It happens when interrupt packets are sent just before
the interrupts are masked.
- spidernet interrupt handler compares interrupt reasons with
interrupt masks, so when such interrupts occurs, spidernet interrupt
handler returns IRQ_NONE.
- When all of interrupt handler return IRQ_NONE, linux kernel disables
the IRQ and it no longer delivers interrupts to the interrupt handlers.
spidernet doesn't work after above sequence, because it can't receive
interrupts.
This patch changes spidernet interrupt handler that it compares
interrupt reason with SPIDER_NET_INTX_MASK_VALUE.
Signed-off-by: Kou Ishizaki <[EMAIL PROTECTED]>
---
Linas-san,
Please apply this to 2.6.23. Because this problem is sometimes happens
and we cannot use the ethernet port any more.
And also, please apply the following Arnd-san's patch to fix a problem
that spidernet driver sometimes causes a BUG_ON at open.
Linas? ACK? Alive? :)
Jeff
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