Messages in this thread | | | Date | Wed, 10 Jun 2015 17:12:21 +0200 | From | leroy christophe <> | Subject | Re: [BUG] mpc8323_rdb platform doesn't boot since kernel 3.16 |
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Le 06/06/2015 17:32, Rob Herring a écrit : > On Sat, Jun 6, 2015 at 6:20 AM, christophe leroy > <christophe.leroy@c-s.fr> wrote: >> I've got a MPC8323 RDB evaluation platform from freescale >> kernel 4.0 doesn't boot >> kernel 3.16 doesn't boot >> kernel 3.15 boots ok >> >> I disected the issue down to your commit "of/fdt: Convert FDT functions to >> use libfdt" (e6a6928c3ea1d0195ed75a091e345696b916c09b) >> >> Do you have an idea of what the issue could be ? > Is your dtb older version of the dtb format (before 0x10)? libfdt > doesn't work on the older versions. Yes, dtb has version 0x11, which seems to be the issue (see below) > > If not, do you have logs with debug enabled in drivers/of/fdt.c? I get "unflatten: error -11 processing FDT"
Indeed, Uboot (version 1.1.6 - installed on that evaluation board) adds a node called "chosen" at the end of the BLOB. But Uboot doesn't update the FDT len in the BLOB header, therefore the following test fails in fdt_offset_ptr()
if (fdt_version(fdt) >= 0x11) if (((offset + len) < offset) || ((offset + len) > fdt_size_dt_struct(fdt))) return NULL;
If I comment this test out, Linux 3.16 to 4.0 work properly on my evaluation board.
Can we find a proper workaround for this issue ?
Christophe
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