The reselection interrupt gets disabled during selection and must be re-enabled when hostdata->connected becomes NULL. If it isn't re-enabled a disconnected command may time-out or the target may wedge the bus while trying to reselect the host. This can happen after a command is aborted.
Fix this by enabling the reselection interrupt in NCR5380_main() after calls to NCR5380_select() and NCR5380_information_transfer() return.
Cc: Michael Schmitz schmitzmic@gmail.com Cc: stable@vger.kernel.org # v4.9+ Fixes: 8b00c3d5d40d ("ncr5380: Implement new eh_abort_handler") Tested-by: Stan Johnson userm57@yahoo.com Signed-off-by: Finn Thain fthain@telegraphics.com.au --- drivers/scsi/NCR5380.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-)
diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c index fe0535affc14..08e3ea8159b3 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -709,6 +709,8 @@ static void NCR5380_main(struct work_struct *work) NCR5380_information_transfer(instance); done = 0; } + if (!hostdata->connected) + NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); spin_unlock_irq(&hostdata->lock); if (!done) cond_resched(); @@ -1110,8 +1112,6 @@ static bool NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) spin_lock_irq(&hostdata->lock); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); NCR5380_reselect(instance); - if (!hostdata->connected) - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); shost_printk(KERN_ERR, instance, "reselection after won arbitration?\n"); goto out; } @@ -1119,7 +1119,6 @@ static bool NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) if (err < 0) { spin_lock_irq(&hostdata->lock); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
/* Can't touch cmd if it has been reclaimed by the scsi ML */ if (!hostdata->selecting) @@ -1157,7 +1156,6 @@ static bool NCR5380_select(struct Scsi_Host *instance, struct scsi_cmnd *cmd) if (err < 0) { shost_printk(KERN_ERR, instance, "select: REQ timeout\n"); NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); goto out; } if (!hostdata->selecting) { @@ -1826,9 +1824,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) */ NCR5380_write(TARGET_COMMAND_REG, 0);
- /* Enable reselect interrupts */ - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); - maybe_release_dma_irq(instance); return; case MESSAGE_REJECT: @@ -1860,8 +1855,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) */ NCR5380_write(TARGET_COMMAND_REG, 0);
- /* Enable reselect interrupts */ - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); #ifdef SUN3_SCSI_VME dregs->csr |= CSR_DMA_ENABLE; #endif @@ -1964,7 +1957,6 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance) cmd->result = DID_ERROR << 16; complete_cmd(instance, cmd); maybe_release_dma_irq(instance); - NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask); return; } msgout = NOP;