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bcm27xx: backup /boot/cmdline.txt and restore early 

If you want to use the Raspberry Pi UART, "console=serial0,115200" needs
to be removed from the kernel cmdline. This is done by editing
/boot/cmdline.txt. However, this file is not currently backed up during
sysupgrade, so this effectively breaks HATs that require the use of the
UART every sysupgrade.

Backup this file during sysupgrade, and restore it before rebooting.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
master
Stijn Tintel 2020-04-17 00:32:18 +03:00
parent ad27c133eb
commit 49ab97ca86
2 changed files with 2 additions and 1 deletions
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1
target/linux/bcm27xx/base-files/lib/upgrade/keep.d/platform
View File

@ -1 +1,2 @@
/boot/cmdline.txt
/boot/config.txt

2
target/linux/bcm27xx/base-files/lib/upgrade/platform.sh
View File

@ -92,7 +92,7 @@ platform_copy_config() {
mkdir -p /boot
[ -f /boot/kernel.img ] || mount -t vfat -o rw,noatime "/dev/$partdev" /boot
cp -af "$UPGRADE_BACKUP" "/boot/$BACKUP_FILE"
tar -C / -zxvf "$UPGRADE_BACKUP" boot/config.txt
tar -C / -zxvf "$UPGRADE_BACKUP" boot/cmdline.txt boot/config.txt
sync
unmount /boot
fi