atari_NCR5380: Set do_abort() timeouts

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>
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>

diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c
index 334d253fe75a36dd974601001c455e0f26786f8f..973ea5189dd45b309b11829bf0b0cade193f3a63 100644 (file)
--- a/drivers/scsi/NCR5380.c
+++ b/drivers/scsi/NCR5380.c
@@ -1458,16 +1458,12 @@ static void do_reset(struct Scsi_Host *instance)
        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)
@@ -1489,9 +1485,9 @@ static int do_abort(struct Scsi_Host *instance)
         * 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;
        
@@ -1500,9 +1496,9 @@ static int do_abort(struct Scsi_Host *instance)
        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;
@@ -1516,6 +1512,10 @@ static int do_abort(struct Scsi_Host *instance)
         */
 
        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)

diff --git a/drivers/scsi/atari_NCR5380.c b/drivers/scsi/atari_NCR5380.c
index 528e0b62fb28cfbc92f9c3d9e90df38b675cd33a..a3c0968c8eef7ed407a10e64e0e151c7fb562b9e 100644 (file)
--- a/drivers/scsi/atari_NCR5380.c
+++ b/drivers/scsi/atari_NCR5380.c
@@ -1835,19 +1835,19 @@ static void do_reset(struct Scsi_Host *instance)
        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
+/**
+ * do_abort - abort the currently established nexus by going to
+ * MESSAGE OUT phase and sending an ABORT message.
+ * @instance: relevant scsi host instance
  *
- * 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);
@@ -1862,16 +1862,20 @@ static int do_abort(struct Scsi_Host *instance)
         * 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);
        }
 
@@ -1887,6 +1891,10 @@ static int do_abort(struct Scsi_Host *instance)
         */
 
        return len ? -1 : 0;
+
+timeout:
+       NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+       return -1;
 }
 
 #if defined(REAL_DMA)