From: Greg KH <gregkh@linuxfoundation.org>
To: Christian Eggers <ceggers@arri.de>
Cc: krzk@kernel.org, o.rempel@pengutronix.de,
u.kleine-koenig@pengutronix.de,
Sudip Mukherjee <sudipm.mukherjee@gmail.com>,
wsa@kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH v5.4] i2c: imx: Check for I2SR_IAL after every byte
Date: Wed, 9 Dec 2020 11:58:59 +0100 [thread overview]
Message-ID: <X9Ct87KVV9BLJSlC@kroah.com> (raw)
In-Reply-To: <20201209093431.15561-1-ceggers@arri.de>
On Wed, Dec 09, 2020 at 10:34:31AM +0100, Christian Eggers wrote:
> commit 1de67a3dee7a279ebe4d892b359fe3696938ec15 upstream.
>
> Arbitration Lost (IAL) can happen after every single byte transfer. If
> arbitration is lost, the I2C hardware will autonomously switch from
> master mode to slave. If a transfer is not aborted in this state,
> consecutive transfers will not be executed by the hardware and will
> timeout.
>
> Signed-off-by: Christian Eggers <ceggers@arri.de>
> Tested (not extensively) on Vybrid VF500 (Toradex VF50):
> Tested-by: Krzysztof Kozlowski <krzk@kernel.org>
> Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
> Cc: stable@vger.kernel.org
> ---
> Hi Greg,
>
> here is the patch for linux-5.4. Please let me know if this doesn't apply to
> older kernels.
That worked everywhere, thanks.
greg k-h
prev parent reply other threads:[~2020-12-09 10:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-09 9:34 [PATCH v5.4] i2c: imx: Check for I2SR_IAL after every byte Christian Eggers
2020-12-09 10:58 ` Greg KH [this message]
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