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Subject[PATCH 4/9] mtip32xx: Abort I/O during secure erase operation
Date
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>
---
drivers/block/mtip32xx/mtip32xx.c | 32 ++++++++++++++++++++++++++++----
1 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index e905c81..92cb601 100644
--- 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))) {
--
1.7.1



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