I'm doing a project in linux, and I'm changing the driver of sym53c8xx (a
SCSI board) to support Target mode.
To receive data, we need 2 interrupts. One is for initializing all of the
structures needed, and the second to send the data to the SCSI layer. What
happens is that bettwen that two interrupts i can't start sending data, but
in some cases that happen, and is beyond my control. To start sending data I
set a bit in a certain register of the chip.
What i would like to know is how can i to a kind of lock so that I set a
variable in the first interrupt, and unset it in the second. If the SCSI
layer trys to send data, I whant to stop before I set the bit of the chip.
But I don't know how...
Can anybody tel me how to do it?
Pedro Semeano
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