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Implement another class of `unit not ready' sense handling that is not

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fatal.. A `long write in progress' is a retry again later command that is
issued when a device returns immediately after a write request but needs
some time before it can handle read requests.
This commit is contained in:
reinoud 2006-10-28 01:24:29 +00:00
parent 4804ddb2d7
commit 8b52dc54b3
1 changed files with 25 additions and 2 deletions
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27
sys/dev/scsipi/cd.c
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@ -1,4 +1,4 @@
/* $NetBSD: cd.c,v 1.255 2006/10/27 21:58:59 christos Exp $ */
/* $NetBSD: cd.c,v 1.256 2006/10/28 01:24:29 reinoud Exp $ */
/*-
* Copyright (c) 1998, 2001, 2003, 2004, 2005 The NetBSD Foundation, Inc.
@ -57,7 +57,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cd.c,v 1.255 2006/10/27 21:58:59 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: cd.c,v 1.256 2006/10/28 01:24:29 reinoud Exp $");
#include "rnd.h"
@ -1030,6 +1030,29 @@ cd_interpret_sense(struct scsipi_xfer *xs)
5 * hz, scsipi_periph_timed_thaw, periph);
retval = ERESTART;
}
/*
* If we got a "Unit not ready" (SKEY_NOT_READY) and "Long write in
* progress" (Sense code 0x04, 0x08), then wait for the specified
* time
*/
if ((SSD_SENSE_KEY(sense->flags) == SKEY_NOT_READY) &&
(sense->asc == 0x04) && (sense->ascq == 0x08)) {
/*
* long write in process; we could listen to the delay; but it
* looks like the skey data is not always returned.
*/
/* cd_delay = _2btol(sense->sks.sks_bytes); */
/* wait for a second and get going again */
if (!callout_pending(&periph->periph_callout))
scsipi_periph_freeze(periph, 1);
callout_reset(&periph->periph_callout,
1 * hz, scsipi_periph_timed_thaw, periph);
retval = ERESTART;
}
return (retval);
}