mtip32xx: Abort I/O during secure erase operation

Currently I/Os are being queued when secure erase operation starts, and issue
them after the operation completes. As all data will be gone when the operation
completes, any queued I/O doesn't make sense. Hence, abort I/O (return -ENODATA)
as soon as the driver receives.

Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index e905c81..92cb601 100644 (file)
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -994,7 +994,6 @@ static bool mtip_pause_ncq(struct mtip_port *port,
                return false;
 
        if (fis->command == ATA_CMD_SEC_ERASE_PREP) {
-               set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
                port->ic_pause_timer = jiffies;
                return true;
        } else if ((fis->command == ATA_CMD_DOWNLOAD_MICRO) &&
@@ -1009,6 +1008,7 @@ static bool mtip_pause_ncq(struct mtip_port *port,
                clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
                /* Com reset after secure erase or lowlevel format */
                mtip_restart_port(port);
+               clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
                return false;
        }
 
@@ -1108,9 +1108,10 @@ static int mtip_exec_internal_command(struct mtip_port *port,
        int_cmd = mtip_get_int_command(dd);
 
        set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
-       port->ic_pause_timer = 0;
 
-       clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
+       if (fis->command == ATA_CMD_SEC_ERASE_PREP)
+               set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
+
        clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
 
        if (atomic == GFP_KERNEL) {
@@ -1247,11 +1248,11 @@ static int mtip_exec_internal_command(struct mtip_port *port,
 exec_ic_exit:
        /* Clear the allocated and active bits for the internal command. */
        mtip_put_int_command(dd, int_cmd);
+       clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
        if (rv >= 0 && mtip_pause_ncq(port, fis)) {
                /* NCQ paused */
                return rv;
        }
-       clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
        wake_up_interruptible(&port->svc_wait);
 
        return rv;
@@ -3684,6 +3685,26 @@ static const struct block_device_operations mtip_block_ops = {
        .owner          = THIS_MODULE
 };
 
+static inline bool is_se_active(struct driver_data *dd)
+{
+       if (unlikely(test_bit(MTIP_PF_SE_ACTIVE_BIT, &dd->port->flags))) {
+               if (dd->port->ic_pause_timer) {
+                       unsigned long to = dd->port->ic_pause_timer +
+                                                       msecs_to_jiffies(1000);
+                       if (time_after(jiffies, to)) {
+                               clear_bit(MTIP_PF_SE_ACTIVE_BIT,
+                                                       &dd->port->flags);
+                               clear_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag);
+                               dd->port->ic_pause_timer = 0;
+                               wake_up_interruptible(&dd->port->svc_wait);
+                               return false;
+                       }
+               }
+               return true;
+       }
+       return false;
+}
+
 /*
  * Block layer make request function.
  *
@@ -3701,6 +3722,9 @@ static int mtip_submit_request(struct blk_mq_hw_ctx *hctx, struct request *rq)
        struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
        unsigned int nents;
 
+       if (is_se_active(dd))
+               return -ENODATA;
+
        if (unlikely(dd->dd_flag & MTIP_DDF_STOP_IO)) {
                if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
                                                        &dd->dd_flag))) {