[U-Boot] [PATCH v2] imx: Use a convenient default value for SYS_MALLOC_F_LEN

[Fabio Estevam <festevam@gmail.com>]

Commit 3a7c45f6a772 ("simple-bus: add DM_FLAG_PRE_RELOC flag to
simple-bus driver") causes some i.MX boards that were converted
to DM, such as warp7, to fail to boot.

As explained by Lukas Auer:

"With the patch, U-Boot probes the drivers for devices under simple-bus
device tree nodes in the pre-relocation device model. The default value
of CONFIG_SYS_MALLOC_F_LEN (0x400) leaves U-Boot with not enough memory to
do this, causing it to hang."

Fix this problem by providing a convenient default value for
CONFIG_SYS_MALLOC_F_LEN.

Reported-by: Pierre-Jean Texier <pjtexier@koncepto.io>
Suggested-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
---
Changes since v1:
- Move the default setting to the main Kconfig and make it depend
on i.MX

 Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Kconfig b/Kconfig
index 7a5491bd67..fd4ff42c17 100644
--- a/Kconfig
+++ b/Kconfig
@@ -138,6 +138,8 @@ config SYS_MALLOC_F_LEN
 	depends on SYS_MALLOC_F
 	default 0x1000 if AM33XX
 	default 0x2800 if SANDBOX
+	default 0x2000 if (ARCH_IMX8 || ARCH_IMX8M || ARCH_MX7 || \
+			   ARCH_MX7ULP || ARCH_MX6 || ARCH_MX5)
 	default 0x400
 	help
 	  Before relocation, memory is very limited on many platforms. Still,
-- 
2.17.1