[PATCH 33/71] atari_NCR5380: Set do_abort() timeouts

Finn Thain
2015-11-18T08:35:28Z

[-- Attachment #1: atari_NCR5380-do_abort-timeouts --]
[-- Type: text/plain, Size: 4496 bytes --]

Use timeouts in do_abort() in atari_NCR5380.c instead of infinite loops.
Also fix the kernel-doc comment. Keep the two core driver forks in sync.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>

---
drivers/scsi/NCR5380.c | 26 +++++++++++++-------------
drivers/scsi/atari_NCR5380.c | 34 +++++++++++++++++++++-------------
2 files changed, 34 insertions(+), 26 deletions(-)

Index: linux/drivers/scsi/atari_NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/atari_NCR5380.c 2015-11-18 19:33:42.000000000 +1100
+++ linux/drivers/scsi/atari_NCR5380.c 2015-11-18 19:33:46.000000000 +1100
@@ -1829,19 +1829,19 @@ static void do_reset(struct Scsi_Host *i
local_irq_restore(flags);
}

-/*
- * Function : do_abort (Scsi_Host *host)
+/**
+ * do_abort - abort the currently established nexus by going to
+ * MESSAGE OUT phase and sending an ABORT message.
+ * @instance: relevant scsi host instance
*
- * Purpose : abort the currently established nexus. Should only be
- * called from a routine which can drop into a
- *
- * Returns : 0 on success, -1 on failure.
+ * Returns 0 on success, -1 on failure.
*/

static int do_abort(struct Scsi_Host *instance)
{
unsigned char tmp, *msgptr, phase;
int len;
+ int rc;

/* Request message out phase */
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
@@ -1856,16 +1856,20 @@ static int do_abort(struct Scsi_Host *in
* the target sees, so we just handshake.
*/

- while (!((tmp = NCR5380_read(STATUS_REG)) & SR_REQ))
- ;
+ rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 10 * HZ);
+ if (rc < 0)
+ goto timeout;
+
+ tmp = NCR5380_read(STATUS_REG) & PHASE_MASK;

NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));

- if ((tmp & PHASE_MASK) != PHASE_MSGOUT) {
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN |
- ICR_ASSERT_ACK);
- while (NCR5380_read(STATUS_REG) & SR_REQ)
- ;
+ if (tmp != PHASE_MSGOUT) {
+ NCR5380_write(INITIATOR_COMMAND_REG,
+ ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
+ rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 3 * HZ);
+ if (rc < 0)
+ goto timeout;
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
}

@@ -1881,6 +1885,10 @@ static int do_abort(struct Scsi_Host *in
*/

return len ? -1 : 0;
+
+timeout:
+ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+ return -1;
}

#if defined(REAL_DMA)
Index: linux/drivers/scsi/NCR5380.c
===================================================================
--- linux.orig/drivers/scsi/NCR5380.c 2015-11-18 19:33:45.000000000 +1100
+++ linux/drivers/scsi/NCR5380.c 2015-11-18 19:33:46.000000000 +1100
@@ -1451,16 +1451,12 @@ static void do_reset(struct Scsi_Host *i
local_irq_restore(flags);
}

-/*
- * Function : do_abort (Scsi_Host *host)
- *
- * Purpose : abort the currently established nexus. Should only be
- * called from a routine which can drop into a
- *
- * Returns : 0 on success, -1 on failure.
+/**
+ * do_abort - abort the currently established nexus by going to
+ * MESSAGE OUT phase and sending an ABORT message.
+ * @instance: relevant scsi host instance
*
- * Locks: queue lock held by caller
- * FIXME: sort this out and get new_eh running
+ * Returns 0 on success, -1 on failure.
*/

static int do_abort(struct Scsi_Host *instance)
@@ -1482,9 +1478,9 @@ static int do_abort(struct Scsi_Host *in
* the target sees, so we just handshake.
*/

- rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 60 * HZ);
+ rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 10 * HZ);
if (rc < 0)
- return -1;
+ goto timeout;

tmp = NCR5380_read(STATUS_REG) & PHASE_MASK;

@@ -1493,9 +1489,9 @@ static int do_abort(struct Scsi_Host *in
if (tmp != PHASE_MSGOUT) {
NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
rc = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 3 * HZ);
- NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
if (rc < 0)
- return -1;
+ goto timeout;
+ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
}
tmp = ABORT;
msgptr = &tmp;
@@ -1509,6 +1505,10 @@ static int do_abort(struct Scsi_Host *in
*/

return len ? -1 : 0;
+
+timeout:
+ NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+ return -1;
}

#if defined(REAL_DMA) || defined(PSEUDO_DMA) || defined (REAL_DMA_POLL)