diff options
| author | dyson <dyson@FreeBSD.org> | 1995-04-22 22:44:30 +0000 |
|---|---|---|
| committer | dyson <dyson@FreeBSD.org> | 1995-04-22 22:44:30 +0000 |
| commit | b8e5de9a5601fbc2bb8b465f51d3ea2312a2fdcd (patch) | |
| tree | e94da8db32c88028166b30566b2b4d97ead36b4d /sys/i386/isa/wd.c | |
| parent | 50e9985ad4164587b178d14add414c6f6e70fdde (diff) | |
| download | FreeBSD-src-b8e5de9a5601fbc2bb8b465f51d3ea2312a2fdcd.zip FreeBSD-src-b8e5de9a5601fbc2bb8b465f51d3ea2312a2fdcd.tar.gz | |
Change the initial delay in wdwait to a DELAY macro call. It is really
too long, but does not impact performance very much when using the
NSECS_MULTI option. This will help solve some mysterious IDE I/O
problems.
Diffstat (limited to 'sys/i386/isa/wd.c')
| -rw-r--r-- | sys/i386/isa/wd.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/sys/i386/isa/wd.c b/sys/i386/isa/wd.c index d729cc6..448cf38 100644 --- a/sys/i386/isa/wd.c +++ b/sys/i386/isa/wd.c @@ -34,7 +34,7 @@ * SUCH DAMAGE. * * from: @(#)wd.c 7.2 (Berkeley) 5/9/91 - * $Id: wd.c,v 1.72 1995/04/12 20:48:10 wollman Exp $ + * $Id: wd.c,v 1.73 1995/04/14 22:31:58 phk Exp $ */ /* TODO: @@ -1923,13 +1923,13 @@ wdwait(struct disk *du, u_char bits_wanted, int timeout) wdc = du->dk_port; timeout += POLLING; - /* dummy read for delay */ - /* - * the reason that we are reading from an *unused* port, - * is that it might be *really* fast to read from the - * wd port. - */ - (void) inb(0x84); +/* + * This delay is really too long, but does not impact the performance + * as much when using the NSECS_MULTI option. Shorter delays have + * caused I/O errors on some drives and system configs. This should + * probably be fixed if we develop a better short term delay mechanism. + */ + DELAY(1); do { #ifdef WD_COUNT_RETRIES |
