CVS commit: src/sys/arch/next68k/dev

["Izumi Tsutsui" <tsutsui%netbsd.org@localhost>]

Module Name:    src
Committed By:   tsutsui
Date:           Fri Jan 27 15:31:05 UTC 2023

Modified Files:
        src/sys/arch/next68k/dev: esp.c

Log Message:
next68k: Fix silent stall of next68k esp(4) SCSI.

next68k esp(4) driver requires nextdma(4) interrupts at ipl 6
during ncr53c9x_intr() for esp(4) at ipl 3.  It worked on netbsd-5
and prior, but on netbsd-5 splbio() was changed from ipl 3 to 6
for SMP support and on netbsd-6 ncr53c9x driver was changed to
use mutex(9) instead of simple_lock(9), so nextdma interrupts
were no longer raised during ncr53c9x interrupt handler.

For now, just call mutex_exit(9) and mutex_enter(9) during
waiting nextdma(4) interrupts in MD esp_dma_intr() handler.
This could be wrong and the interrupt handler for nextdma should
be reorganized, but it just works.

Should be pulled up to netbsd-10 and netbsd-9.


To generate a diff of this commit:
cvs rdiff -u -r1.64 -r1.65 src/sys/arch/next68k/dev/esp.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.