2021-07-22 10:14:16

by Vladimir Oltean

Subject: [PATCH net-next] arm64: dts: armada-3720-turris-mox: fixed indices for the SDHC controllers

Since drivers/mmc/host/sdhci-xenon.c declares the PROBE_PREFER_ASYNCHRONOUS
probe type, it is not guaranteed whether /dev/mmcblk0 will belong to
sdhci0 or sdhci1. In turn, this will break booting by:

root=/dev/mmcblk0p1

Fix the issue by adding aliases so that the old MMC controller indices
are preserved.

Fixes: 7320915c8861 ("mmc: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in v4.14")
Signed-off-by: Vladimir Oltean <[email protected]>
---
arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
index ce2bcddf396f..f2d7d6f071bc 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
@@ -19,6 +19,8 @@ / {
aliases {
spi0 = &spi0;
ethernet1 = &eth1;
+ mmc0 = &sdhci0;
+ mmc1 = &sdhci1;
};

chosen {
--
2.25.1

2021-07-23 12:59:51

by Gregory CLEMENT

Subject: Re: [PATCH net-next] arm64: dts: armada-3720-turris-mox: fixed indices for the SDHC controllers

Hi Vladimir,

> Since drivers/mmc/host/sdhci-xenon.c declares the PROBE_PREFER_ASYNCHRONOUS
> probe type, it is not guaranteed whether /dev/mmcblk0 will belong to
> sdhci0 or sdhci1. In turn, this will break booting by:
>
> root=/dev/mmcblk0p1
>
> Fix the issue by adding aliases so that the old MMC controller indices
> are preserved.
>
> Fixes: 7320915c8861 ("mmc: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in v4.14")
> Signed-off-by: Vladimir Oltean <[email protected]>

Applied on mvebu/fixes

Thanks,

Gregory

> ---
> arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
> index ce2bcddf396f..f2d7d6f071bc 100644
> --- a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
> @@ -19,6 +19,8 @@ / {
> aliases {
> spi0 = &spi0;
> ethernet1 = &eth1;
> + mmc0 = &sdhci0;
> + mmc1 = &sdhci1;
> };
>
> chosen {
> --
> 2.25.1
>

--
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com