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Do something Peter Dufault long since intended to do: make a current

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error code with ASC/ASCQ 4/1 (``Logical unit is in the process of
becoming ready'') non-fatal.  Retry the operation until it will
eventually either yield a real error condition, or finally succeed.

Devices like CD changers or tape drives with a freshly inserted
cartridge should benefit from this.

Should go into 2.2 after some testing in -current.  I'd like to see
this in the release if possible.
This commit is contained in:
Joerg Wunsch 1996-12-24 11:32:41 +00:00
parent 926f037af9
commit 802e82cdd2
1 changed files with 18 additions and 4 deletions
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22
sys/scsi/scsi_base.c
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@ -8,7 +8,7 @@
* file.
*
* Written by Julian Elischer (julian@dialix.oz.au)
* $Id: scsi_base.c,v 1.38 1996/05/03 21:01:42 phk Exp $
* $Id: scsi_base.c,v 1.39 1996/07/14 10:46:48 joerg Exp $
*/
#include "opt_bounce.h"
@ -932,11 +932,12 @@ scsi_interpret_sense(xs)
struct scsi_xfer *xs;
{
struct scsi_sense_data *sense;
struct scsi_sense_extended *ext;
struct scsi_link *sc_link = xs->sc_link;
u_int32_t key;
u_int32_t silent;
errval errcode;
int error_code;
int error_code, asc, ascq;
/*
* If the flags say errs are ok, then always return ok.
@ -946,6 +947,7 @@ scsi_interpret_sense(xs)
return (ESUCCESS);
sense = &(xs->sense);
ext = &(sense->ext.extended);
#ifdef SCSIDEBUG
if (sc_link->flags & SDEV_DB1) {
@ -1016,9 +1018,21 @@ scsi_interpret_sense(xs)
}
/* otherwise use the default */
silent = (xs->flags & SCSI_SILENT);
key = sense->ext.extended.flags & SSD_KEY;
silent = xs->flags & SCSI_SILENT;
key = ext->flags & SSD_KEY;
error_code = sense->error_code & SSD_ERRCODE;
asc = (ext->extra_len >= 5) ? ext->add_sense_code : 0;
ascq = (ext->extra_len >= 6) ? ext->add_sense_code_qual : 0;
/*
* Retry while the device is returning a ``Logical unit
* is in the process of becoming ready.'' (until it either
* eventually yields an error, or finally succeeds).
*/
if (error_code == 0x70 /* current error */ &&
(int)key == 0x2 /* not ready */ &&
asc == 4 && ascq == 1 /* logical unit i i t p o b r */)
return (SCSIRET_DO_RETRY);
if (!silent) {
scsi_sense_print(xs);