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[microblaze-uclinux] FSL driver interruption management



Hello,

I am trying to write a fsl driver for powerpc405 runnig Linux Kernel
2.6. I consulted FSL driver developed for microblaze Linux kernel 2.4.

One thing I am not sure about is the reason why the driver disables
the interrupt every time checking device status (save_flags_cli(flags)
& store_flags(flags)).

Because the powerpc interrupt mechanism is more complicated and it's
hard for me to figure out the counterpart with that of the microblaze.

Is it for avoiding race conditions? But there are separate channels
for tx and rx, and to my understanding, each tasklet function can only
have one running instance on a single processor context.

Thank you,

Guangye Tian
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