bcm27xx: correct cmdline.txt consoles for procd

Commit [ca8c30208d5e][1] updates procd to handle muliple "console=" on the
kernel command line. This affects Raspberry Pi builds because cmdline.txt
specifies a UART console and a virtual console on HDMI, in that order.

When procd finds multiple consoles on the command line, it attempts to
open /dev/console. Linux uses the [last console][2] for /dev/console, so
procd opens the virtual console on Raspberry Pi. This completely disables
the UART console and causes [strange behavior][3] on the virtual console.
Prior to ca8c30208d5e, procd would always open the first console, which is
the UART console.

The simplest fix without reverting ca8c30208d5e is to swap the order of
console options in cmdline.txt. By putting the UART console last, procd
handles the serial console correctly as before.

[1]: https://git.openwrt.org/?p=project/procd.git;a=commit;h=ca8c30208d5e1aaa2c0e3f732c4c9944735e9850
[2]: https://www.kernel.org/doc/html/latest/admin-guide/serial-console.html
[3]: https://forum.openwrt.org/t/rasberry-pi-4-model-b-keyboards-gone-wild/195594

Signed-off-by: Elbert Mai <code@elbertmai.com>

diff --git a/target/linux/bcm27xx/image/cmdline.txt b/target/linux/bcm27xx/image/cmdline.txt
index 41f76f10af078a2b24c753c09194337ca721c8f4..bdd1e59a093627ee7e18db48c63e174ca9d42a26 100644 (file)
--- a/target/linux/bcm27xx/image/cmdline.txt
+++ b/target/linux/bcm27xx/image/cmdline.txt
@@ -1 +1 @@
-console=serial0,115200 console=tty1 root=@ROOT@ rootfstype=squashfs,ext4 rootwait
+console=tty1 console=serial0,115200 root=@ROOT@ rootfstype=squashfs,ext4 rootwait