From: Niklas Cassel <cassel@kernel.org>
To: linux-ide@vger.kernel.org, Kyrylo Biryuk <illofspeed@gmail.com>
Cc: dlemoal@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4] ata: libahci: re-enable FBS after error handling on a port multiplier
Date: Mon, 12 Oct 2026 13:15:53 +0200 [thread overview]
Message-ID: <179180375308.3361750.14419165345521200532.b4-ty@kernel.org> (raw)
In-Reply-To: <20261012103917.389-1-illofspeed@gmail.com>
On Mon, 12 Oct 2026 12:39:17 +0200, Kyrylo Biryuk wrote:
> ahci_do_softreset() disables FBS before resetting a device behind a port
> multiplier, as required by AHCI 1.2 section 9.3.9, and re-enables it only
> when that softreset succeeds. If it fails, for example because a
> hot-plugged drive is still spinning up ("softreset failed (device not
> ready)"), EH escalates to a hardreset of the PMP link, and nothing turns
> FBS back on: only ahci_pmp_attach() does, which runs at the next boot.
> The port keeps working with command-based switching until then.
>
> [...]
Applied to libata/linux.git (for-7.4), thanks!
[1/1] ata: libahci: re-enable FBS after error handling on a port multiplier
https://git.kernel.org/libata/linux/c/21d333ab
Kind regards,
Niklas
next prev parent reply other threads:[~2026-10-12 11:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-12 10:39 Kyrylo Biryuk
2026-10-12 11:15 ` Niklas Cassel [this message]
2026-10-15 5:37 ` Damien Le Moal
2026-10-15 7:21 ` Niklas Cassel
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