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| author | Jens Axboe | 2017-04-28 15:54:06 +0200 |
|---|---|---|
| committer | Jens Axboe | 2017-05-02 15:52:08 +0200 |
| commit | baed548a98397f57a71d61917177f7d42ab17881 (patch) | |
| tree | 0e8a717cea2da2f7a40f468fd6d80add778f1c43 /drivers/block/mtip32xx | |
| parent | mtip32xx: kill atomic argument to mtip_quiesce_io() (diff) | |
| download | kernel-qcow2-linux-baed548a98397f57a71d61917177f7d42ab17881.tar.gz kernel-qcow2-linux-baed548a98397f57a71d61917177f7d42ab17881.tar.xz kernel-qcow2-linux-baed548a98397f57a71d61917177f7d42ab17881.zip | |
mtip32xx: abstract out "are any commands active" helper
This is a prep patch for backoff in ->queue_rq() for non-ncq commands.
Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/mtip32xx')
| -rw-r--r-- | drivers/block/mtip32xx/mtip32xx.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c index 36f3d34f2156..aee94f260725 100644 --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -1030,6 +1030,22 @@ static bool mtip_pause_ncq(struct mtip_port *port, return false; } +static bool mtip_commands_active(struct mtip_port *port) +{ + unsigned int active; + unsigned int n; + + /* + * Ignore s_active bit 0 of array element 0. + * This bit will always be set + */ + active = readl(port->s_active[0]) & 0xFFFFFFFE; + for (n = 1; n < port->dd->slot_groups; n++) + active |= readl(port->s_active[n]); + + return active != 0; +} + /* * Wait for port to quiesce * @@ -1043,8 +1059,7 @@ static bool mtip_pause_ncq(struct mtip_port *port, static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout) { unsigned long to; - unsigned int n; - unsigned int active = 1; + bool active = true; blk_mq_stop_hw_queues(port->dd->queue); @@ -1061,14 +1076,7 @@ static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout) if (mtip_check_surprise_removal(port->dd->pdev)) goto err_fault; - /* - * Ignore s_active bit 0 of array element 0. - * This bit will always be set - */ - active = readl(port->s_active[0]) & 0xFFFFFFFE; - for (n = 1; n < port->dd->slot_groups; n++) - active |= readl(port->s_active[n]); - + active = mtip_commands_active(port); if (!active) break; } while (time_before(jiffies, to)); |