From: axboe@fb.com (Jens Axboe)
Subject: [PATCH v2] nvme: Avoid reset work on watchdog timer function during error recovery
Date: Tue, 12 Apr 2016 23:22:48 -0600 [thread overview]
Message-ID: <570DD7A8.9050607@fb.com> (raw)
In-Reply-To: <1460503929-22613-1-git-send-email-gpiccoli@linux.vnet.ibm.com>
On 04/12/2016 05:32 PM, Guilherme G. Piccoli wrote:
> This patch adds a check on nvme_watchdog_timer() function to avoid the
> call to reset_work() when an error recovery process is ongoing on
> controller. The check is made by looking at pci_channel_offline()
> result.
>
> If we don't check for this on nvme_watchdog_timer(), error recovery
> mechanism can't recover well, because reset_work() won't be able to
> do its job (since we're in the middle of an error) and so the
> controller is removed from the system before error recovery mechanism
> can perform slot reset (which would allow the adapter to recover).
>
> In this patch we also have splitted the huge condition expression in
> nvme_watchdog_timer() by introducing an auxiliary function to help
> make the code more readable.
Added for 4.7, thanks.
--
Jens Axboe
next prev parent reply other threads:[~2016-04-13 5:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-12 23:32 [PATCH v2] nvme: Avoid reset work on watchdog timer function during error recovery Guilherme G. Piccoli
2016-04-13 5:22 ` Jens Axboe [this message]
2016-04-13 6:03 ` Jens Axboe
2016-04-13 14:12 ` Guilherme G. Piccoli
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