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Fix an infinite loop caused by calling ahc_run_done queue while the

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driver is waiting a bus settle delay.  There should really be a facility
for the controller driver to "freeze" its queue during recovery operations
which would make all of this gymnastics unnecessary.
This commit is contained in:
Justin T. Gibbs 1997-04-07 18:32:47 +00:00
parent 0fb28c0973
commit 8d94b804a1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=24709
1 changed files with 32 additions and 3 deletions
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35
sys/i386/scsi/aic7xxx.c
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@ -32,7 +32,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: aic7xxx.c,v 1.112 1997/04/04 19:36:04 gibbs Exp $
* $Id: aic7xxx.c,v 1.113 1997/04/05 21:41:13 gibbs Exp $
*/
/*
* TODO:
@ -301,6 +301,7 @@ static void ahc_add_curscb_to_free_list __P((struct ahc_softc *ahc));
static void ahc_clear_intstat __P((struct ahc_softc *ahc));
static void ahc_reset_current_bus __P((struct ahc_softc *ahc));
static void ahc_run_done_queue __P((struct ahc_softc *ahc));
static void ahc_untimeout_done_queue __P((struct ahc_softc *ahc));
static void ahc_scsirate __P((struct ahc_softc* ahc, u_int8_t *scsirate,
u_int8_t *period, u_int8_t *offset,
char channel, int target));
@ -3625,6 +3626,8 @@ ahc_reset_current_bus(ahc)
/* Wait a minimal bus settle delay */
DELAY(AHC_BUSSETTLE_DELAY);
ahc_run_done_queue(ahc);
}
}
@ -3692,6 +3695,7 @@ ahc_busreset_settle_complete(arg)
printf("Clearing 'in-reset' flag\n");
ahc->in_reset &= (args->bus == 'A' ? ~CHANNEL_A_RESET
: ~CHANNEL_B_RESET);
ahc_run_done_queue(ahc);
splx(s);
}
@ -3777,11 +3781,22 @@ ahc_reset_channel(ahc, channel, xs_error, initiate_reset)
ahc_clear_intstat(ahc);
restart_sequencer(ahc);
}
ahc_run_done_queue(ahc);
/*
* Untimeout our scbs now in case we have to delay our done
* processing.
*/
ahc_untimeout_done_queue(ahc);
if (initiate_reset == 0) {
/*
* If we initiated the reset, we'll run the queue
* once our bus-settle delay has expired.
*/
ahc_run_done_queue(ahc);
}
return found;
}
void
static void
ahc_run_done_queue(ahc)
struct ahc_softc *ahc;
{
@ -3795,6 +3810,20 @@ ahc_run_done_queue(ahc)
}
}
static void
ahc_untimeout_done_queue(ahc)
struct ahc_softc *ahc;
{
int i;
struct scb *scbp;
for (i = 0; i < ahc->scb_data->numscbs; i++) {
scbp = ahc->scb_data->scbarray[i];
if (scbp->flags & SCB_QUEUED_FOR_DONE)
untimeout(ahc_timeout, (caddr_t)scbp);
}
}
static int
ahc_match_scb (scb, target, channel, lun, tag)
struct scb *scb;