On Tuesday 31 January 2017 02:31:45 Finn Thain wrote: [...] > Are you trying to figure out which commands are going to disconnect during > a transfer? This is really a function of the firmware in the target; there > are no good heuristics AFAICT, so the PDMA algorithm has to be robust. > mac_scsi has to cope with this too. > > Does the problem go away when you assign no IRQ? When instance->irq == > NO_IRQ, the core driver will inhibit disconnect privileges. Yes, it seems to run fine with IRQ/disconnect disabled. With IRQ enabled, "dd if=/dev/sr0 of=anything" stops after a while. I get gated 53C80 IRQ, BASR=0x10, MODE=0x0e, STATUS=0x7c. When I enable interrupts during PDMA (like the removed UNSAFE macro did), the problems go away. I see an IRQ after each pread call. (had to disable "no 53C80 gated irq after transfer" and "no end dma signal" messages to reduce log spam) -- Ondrej Zary
