CVS commit: src/sys/dev/ic

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

Module Name:    src
Committed By:   tsutsui
Date:           Fri Mar 20 16:28:57 UTC 2009

Modified Files:
        src/sys/dev/ic: z8530sc.c z8530tty.c

Log Message:
Try to avoid zstty hangs on higher speed:

z8530sc.c:
 Check pending interrupts in a loop until all requests are handled.
 The old comments said it would cause horrible latency to sun3x floppy etc,
 but serial ports should have higher priority than disks anyway.

z8530tty.c:
 Don't enable and disable TX interrupts on each transmit start and completion
 because it could cause possible race conditions.
 Instead, set ZSWR0_RESET_TXINT on each TIE interrupt to clear the request
 as other kbd drivers attached at zs(4).

Tested on cobalt, macppc, news68k, sparc, and sun3.


To generate a diff of this commit:
cvs rdiff -u -r1.28 -r1.29 src/sys/dev/ic/z8530sc.c
cvs rdiff -u -r1.123 -r1.124 src/sys/dev/ic/z8530tty.c

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