From 8e21afa18d7477028269afe81fa448f47b34d937 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Sun, 9 Jun 2019 11:19:11 +1000 Subject: [PATCH] scsi: NCR5380: Always re-enable reselection interrupt commit 57f31326518e98ee4cabf9a04efe00ed57c54147 upstream. 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 Cc: stable@vger.kernel.org # v4.9+ Fixes: 8b00c3d5d40d ("ncr5380: Implement new eh_abort_handler") Signed-off-by: Finn Thain Tested-by: Stan Johnson Tested-by: Michael Schmitz Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- 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 5d6e387..3cfab88 100644 --- a/drivers/scsi/NCR5380.c +++ b/drivers/scsi/NCR5380.c @@ -813,6 +813,8 @@ 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(); @@ -1208,8 +1210,6 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance, 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; } @@ -1217,7 +1217,6 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance, 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) @@ -1255,7 +1254,6 @@ static struct scsi_cmnd *NCR5380_select(struct Scsi_Host *instance, 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) { @@ -1906,9 +1904,6 @@ 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: @@ -1940,8 +1935,6 @@ 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 @@ -2049,7 +2042,6 @@ 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; -- 2.7.4