On 24 October 2018 at 07:36, Bin Meng bmeng.cn@gmail.com wrote:
When a driver declares DM_FLAG_PRE_RELOC flag, it wishes to be bound before relocation. However due to a bug in the DM core, the flag only takes effect when devices are statically declared via U_BOOT_DEVICE(). This bug has been fixed recently by commit "dm: core: Respect drivers with the DM_FLAG_PRE_RELOC flag in lists_bind_fdt()", but with the fix, it has a side effect that all existing drivers that declared DM_FLAG_PRE_RELOC flag will be bound before relocation now. This may expose potential boot failure on some boards due to insufficient memory during the pre-relocation stage.
To mitigate this potential impact, the following changes are implemented:
- Remove DM_FLAG_PRE_RELOC flag in the driver, if the driver only supports configuration from device tree (OF_CONTROL)
- Keep DM_FLAG_PRE_RELOC flag in the driver only if the device is statically declared via U_BOOT_DEVICE()
- Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for drivers that support both statically declared devices and configuration from device tree
Signed-off-by: Bin Meng bmeng.cn@gmail.com
drivers/pinctrl/broadcom/pinctrl-bcm283x.c | 2 ++ drivers/pinctrl/exynos/pinctrl-exynos7420.c | 1 - drivers/pinctrl/nxp/pinctrl-imx5.c | 2 ++ drivers/pinctrl/nxp/pinctrl-imx6.c | 2 ++ drivers/pinctrl/nxp/pinctrl-imx7.c | 2 ++ drivers/pinctrl/nxp/pinctrl-imx7ulp.c | 2 ++ drivers/pinctrl/pinctrl-single.c | 1 - drivers/pinctrl/uniphier/pinctrl-uniphier-pro4.c | 2 ++ drivers/pinctrl/uniphier/pinctrl-uniphier-pro5.c | 2 ++ 9 files changed, 14 insertions(+), 2 deletions(-)
Reviewed-by: Simon Glass sjg@chromium.org