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nvme: do not try to reconfigure APST when the controller is not live

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commit 53fe2a30bc upstream.

Do not call nvme_configure_apst when the controller is not live, given
that nvme_configure_apst will fail due the lack of an admin queue when
the controller is being torn down and nvme_set_latency_tolerance is
called from dev_pm_qos_hide_latency_tolerance.

Fixes: 510a405d945b("nvme: fix memory leak for power latency tolerance")
Reported-by: Peng Liu <liupeng17@lenovo.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christoph Hellwig 2021-04-09 11:46:12 +02:00 • committed by Greg Kroah-Hartman
commit cd709c8e06
1 changed files with 2 additions and 1 deletions
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3
drivers/nvme/host/core.c
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@ -2622,7 +2622,8 @@ static void nvme_set_latency_tolerance(struct device *dev, s32 val)
if (ctrl->ps_max_latency_us != latency) {
ctrl->ps_max_latency_us = latency;
nvme_configure_apst(ctrl);
if (ctrl->state == NVME_CTRL_LIVE)
nvme_configure_apst(ctrl);
}
}