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Allow slow SCSI CDROMs more time to start up.

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PR:		5181
Submitted by:	Wilko Bulte <wilko@yedi.iaf.nl>
This commit is contained in:
James Raynard 1997-12-14 00:32:33 +00:00
parent 8a0eb35293
commit 5ecfccd5ba
1 changed files with 13 additions and 1 deletions
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14
sys/scsi/cd.c
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@ -14,7 +14,7 @@
*
* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
*
* $Id: cd.c,v 1.86 1997/09/21 22:02:59 gibbs Exp $
* $Id: cd.c,v 1.87 1997/12/02 21:06:58 phk Exp $
*/
#include "opt_bounce.h"
@ -242,6 +242,7 @@ cd_open(dev_t dev, int flags, int fmt, struct proc *p,
errval errcode = 0;
u_int32_t unit, part;
struct scsi_data *cd;
int n;
unit = CDUNIT(dev);
part = PARTITION(dev);
@ -285,6 +286,17 @@ cd_open(dev_t dev, int flags, int fmt, struct proc *p,
SC_DEBUG(sc_link, SDEV_DB3, ("'start' attempted "));
}
sc_link->flags |= SDEV_OPEN; /* unit attn errors are now errors */
/*
* Some drives take a long time to become ready after a disk swap
* and report 'Not Ready' rather than 'Unit in the Process of Getting
* Ready' while doing so; attempts to mount during this period will
* return ENXIO. Give them some time to come up.
*/
for (n = 0; scsi_test_unit_ready(sc_link, SCSI_SILENT) && n != 12; n++)
tsleep(cd, PRIBIO | PCATCH, "cdrdy", hz);
/* If still not ready, give up */
if (scsi_test_unit_ready(sc_link, SCSI_SILENT) != 0) {
SC_DEBUG(sc_link, SDEV_DB3, ("not ready\n"));
errcode = ENXIO;