[Buildroot] [PATCH v2] imx/genimage: Place the rootfs at a proper offset when BR2_LINUX_KERNEL_INSTALL_TARGET=y

[Peter Korsgaard]

>>>>> "Fabio" == Fabio Estevam <festevam at gmail.com> writes:

 > Currently, when BR2_LINUX_KERNEL_INSTALL_TARGET=y is selected, issuing
 > a "saveenv" command in the U-Boot prompt may lead to rootfs corruption.

 > When BR2_LINUX_KERNEL_INSTALL_TARGET is not selected, then
 > board/freescale/common/imx/genimage.cfg.template is used as per the logic
 > inside board/freescale/common/imx/post-image.sh.

 > board/freescale/common/imx/genimage.cfg.template correctly puts the
 > rootfs at a safe offset.

 > With BR2_LINUX_KERNEL_INSTALL_TARGET=y, then
 > board/freescale/common/imx/genimage.cfg.template_no_boot_part or
 > board/freescale/common/imx/genimage.cfg.template_no_boot_part_spl
 > are used and no offset to the rootfs is given, which may cause U-Boot
 > environment area to write into the rootfs area, causing the rootfs
 > corruption.

 > Avoid this problem by placing the rootfs at an 8MB offset, just like
 > it is done in board/freescale/common/imx/genimage.cfg.

 > Tested on a imx6qp-wandboard and also on a custom imx6ull based board.

 > "saveenv" does not corrupt the rootfs anymore after this change.

 > Signed-off-by: Fabio Estevam <festevam at gmail.com>
 > ---
 > Changes since v1:
 > - Improve commit log (Yann)

Committed to 2021.02.x and 2021.08.x, thanks.

-- 
Bye, Peter Korsgaard