From: Liu Bo Date: Thu, 5 Jul 2018 19:07:13 +0000 (+0800) Subject: null_blk: remove NULLB_DEV_FL_CONFIGURED on turning off nullb device X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=00a8cdb84fcb64c7f9f1061298ff676a96dfaf41;p=openwrt%2Fstaging%2Fblogic.git null_blk: remove NULLB_DEV_FL_CONFIGURED on turning off nullb device Currently mbps knob could only be set once before switching power knob to on, after power knob has been set at least once, there is no way to set mbps knob again due to -EBUSY. As nullb is mainly used for testing, in order to make it flexible, this removes the flag NULLB_DEV_FL_CONFIGURED so that mbps knob can be reset when power knob is off, e.g. echo 0 > /config/nullb/a/power echo 40 > /config/nullb/a/mbps echo 1 > /config/nullb/a/power So does other knobs under /config/nullb/a. Signed-off-by: Liu Bo Signed-off-by: Jens Axboe --- diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index 042c778e5a4e..8abfb1059909 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -390,6 +390,7 @@ static ssize_t nullb_device_power_store(struct config_item *item, null_del_dev(dev->nullb); mutex_unlock(&lock); clear_bit(NULLB_DEV_FL_UP, &dev->flags); + clear_bit(NULLB_DEV_FL_CONFIGURED, &dev->flags); } return count;