From: Damien Le Moal <dlemoal@kernel.org>
To: Rosen Penev <rosenp@gmail.com>, linux-ide@vger.kernel.org
Cc: Niklas Cassel <cassel@kernel.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCHv2] ata: pata_ep93xx: fix PIO fallback when DMA init fails
Date: Thu, 23 Jul 2026 16:37:14 +0900 [thread overview]
Message-ID: <7779fcfc-f74e-48f2-bd87-c59087ca96ff@kernel.org> (raw)
In-Reply-To: <20260720020229.1972888-1-rosenp@gmail.com>
On 7/20/26 11:02, Rosen Penev wrote:
> ep93xx_pata_dma_init() returns an error when dma_request_chan() fails,
> which causes ep93xx_pata_probe() to abort entirely. The probe function
> already has a PIO fallback path (it checks both channel pointers before
> enabling UDMA), so the DMA init should not fail the probe on non-fatal
> errors.
>
> Propagate -EPROBE_DEFER, such that we allow the DMA controller driver
> to load, in case we got probed before the DMA controller driver.
> For all other failures (e.g. -ENODEV when the DMA controller is missing
> in the device tree), fall back to PIO.
>
> Assisted-by: Opencode:Big-Pickle
> Signed-off-by: Rosen Penev <rosenp@gmail.com>
Applied to for-7.3. Thanks!
--
Damien Le Moal
Western Digital Research
prev parent reply other threads:[~2026-07-23 7:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-20 2:02 [PATCHv2] ata: pata_ep93xx: fix PIO fallback when DMA init fails Rosen Penev
2026-07-23 7:37 ` Damien Le Moal [this message]
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