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authorFinn Thain <fthain@telegraphics.com.au>2016-01-03 16:05:10 +1100
committerMartin K. Petersen <martin.petersen@oracle.com>2016-01-06 21:42:53 -0500
commit636b1ec8575a60fb305ad6e3ede5e79d287754b6 (patch)
tree9accfd2330d5fd73509edaaf0b51930e267d81a5 /drivers/scsi/NCR5380.c
parent4d8c08c71ea261a31855e4919fa8b875cd507ef3 (diff)
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atari_NCR5380: Reset bus on driver initialization if required
Merge the bus reset code from NCR5380.c into atari_NCR5380.c. This allows for removal of a lot of duplicated code conditional on the RESET_BOOT macro (in the next patch). The atari_NCR5380.c fork lacks the do_reset() and NCR5380_poll_politely() routines from NCR5380.c, so introduce them. They are indispensible. Keep the two implementations in sync. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: Ondrej Zary <linux@rainbow-software.org> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/NCR5380.c')
-rw-r--r--drivers/scsi/NCR5380.c33
1 files changed, 21 insertions, 12 deletions
diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c
index 7457bd33e965..391ee8db5de1 100644
--- a/drivers/scsi/NCR5380.c
+++ b/drivers/scsi/NCR5380.c
@@ -838,19 +838,20 @@ static int NCR5380_maybe_reset_bus(struct Scsi_Host *instance)
case 1:
case 3:
case 5:
- printk(KERN_INFO "scsi%d: SCSI bus busy, waiting up to five seconds\n", instance->host_no);
- NCR5380_poll_politely(instance, STATUS_REG, SR_BSY, 0, 5*HZ);
+ shost_printk(KERN_ERR, instance, "SCSI bus busy, waiting up to five seconds\n");
+ NCR5380_poll_politely(instance,
+ STATUS_REG, SR_BSY, 0, 5 * HZ);
break;
case 2:
- printk(KERN_WARNING "scsi%d: bus busy, attempting abort\n", instance->host_no);
+ shost_printk(KERN_ERR, instance, "bus busy, attempting abort\n");
do_abort(instance);
break;
case 4:
- printk(KERN_WARNING "scsi%d: bus busy, attempting reset\n", instance->host_no);
+ shost_printk(KERN_ERR, instance, "bus busy, attempting reset\n");
do_reset(instance);
break;
case 6:
- printk(KERN_ERR "scsi%d: bus locked solid or invalid override\n", instance->host_no);
+ shost_printk(KERN_ERR, instance, "bus locked solid\n");
return -ENXIO;
}
}
@@ -1579,21 +1580,29 @@ static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase
}
/**
- * do_reset - issue a reset command
- * @host: adapter to reset
+ * do_reset - issue a reset command
+ * @instance: adapter to reset
*
- * Issue a reset sequence to the NCR5380 and try and get the bus
- * back into sane shape.
+ * Issue a reset sequence to the NCR5380 and try and get the bus
+ * back into sane shape.
*
- * Locks: caller holds queue lock
+ * This clears the reset interrupt flag because there may be no handler for
+ * it. When the driver is initialized, the NCR5380_intr() handler has not yet
+ * been installed. And when in EH we may have released the ST DMA interrupt.
*/
static void do_reset(struct Scsi_Host *instance)
{
- NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK));
+ unsigned long flags;
+
+ local_irq_save(flags);
+ NCR5380_write(TARGET_COMMAND_REG,
+ PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK));
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST);
- udelay(25);
+ udelay(50);
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+ (void)NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+ local_irq_restore(flags);
}
/*