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authorJens Axboe <axboe@fb.com>2014-05-14 08:22:56 -0600
committerJens Axboe <axboe@fb.com>2014-05-14 08:22:56 -0600
commit9acf03cfb1fbecc058d3f223323e3ed97763f1e6 (patch)
tree391c6b64de88f7062288604d77a04b4ee4b42ab3 /drivers/block/mtip32xx
parenta8a642ccd2e86248ae23c5d762dac67eaea02423 (diff)
mtip32xx: stop block hardware queues before quiescing IO
We need to stop the block layer queues to prevent new "normal" IO from entering the driver, while we wait for existing commands to finish. Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/mtip32xx')
-rw-r--r--drivers/block/mtip32xx/mtip32xx.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 5979ab3afd8..4efc676aa5f 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -1031,6 +1031,8 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
unsigned int n;
unsigned int active = 1;
+ blk_mq_stop_hw_queues(port->dd->queue);
+
to = jiffies + msecs_to_jiffies(timeout);
do {
if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags) &&
@@ -1039,7 +1041,7 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
continue; /* svc thd is actively issuing commands */
}
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
- return -EFAULT;
+ goto err_fault;
/*
* Ignore s_active bit 0 of array element 0.
* This bit will always be set
@@ -1054,7 +1056,11 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
msleep(20);
} while (time_before(jiffies, to));
+ blk_mq_start_stopped_hw_queues(port->dd->queue, true);
return active ? -EBUSY : 0;
+err_fault:
+ blk_mq_start_stopped_hw_queues(port->dd->queue, true);
+ return -EFAULT;
}
/*