* [PATCH v2] Revert "MIPS: Octeon: Remove special handling of CONFIG_MIPS_ELF_APPENDED_DTB=y"
@ 2021-01-19 11:15 Kevin Hao
2021-01-19 22:06 ` Thomas Bogendoerfer
0 siblings, 1 reply; 2+ messages in thread
From: Kevin Hao @ 2021-01-19 11:15 UTC (permalink / raw)
To: Thomas Bogendoerfer; +Cc: Yasha Cherikovsky, linux-mips
This reverts commit d9df9fb901d25b941ab2cfb5b570d91fb2abf7a3.
For the OCTEON boards, it need to patch the built-in DTB before using
it. Previously it judges if it is a built-in DTB by checking
fw_passed_dtb. But after commit 37e5c69ffd41 ("MIPS: head.S: Init
fw_passed_dtb to builtin DTB", the fw_passed_dtb is initialized even
when using built-in DTB. This causes the OCTEON boards boot broken due
to an unpatched built-in DTB is used. Revert the commit d9df9fb901d2 to
restore the codes before the fw_passed_dtb is used and then fix this
issue.
Fixed: 37e5c69ffd41 ("MIPS: head.S: Init fw_passed_dtb to builtin DTB")
Cc: stable@vger.kernel.org
Suggested-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Kevin Hao <haokexin@gmail.com>
---
arch/mips/cavium-octeon/setup.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index 982826ba0ef7..ce4e2806159b 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -1149,12 +1149,15 @@ void __init device_tree_init(void)
bool do_prune;
bool fill_mac;
- if (fw_passed_dtb) {
- fdt = (void *)fw_passed_dtb;
+#ifdef CONFIG_MIPS_ELF_APPENDED_DTB
+ if (!fdt_check_header(&__appended_dtb)) {
+ fdt = &__appended_dtb;
do_prune = false;
fill_mac = true;
pr_info("Using appended Device Tree.\n");
- } else if (octeon_bootinfo->minor_version >= 3 && octeon_bootinfo->fdt_addr) {
+ } else
+#endif
+ if (octeon_bootinfo->minor_version >= 3 && octeon_bootinfo->fdt_addr) {
fdt = phys_to_virt(octeon_bootinfo->fdt_addr);
if (fdt_check_header(fdt))
panic("Corrupt Device Tree passed to kernel.");
--
2.29.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] Revert "MIPS: Octeon: Remove special handling of CONFIG_MIPS_ELF_APPENDED_DTB=y"
2021-01-19 11:15 [PATCH v2] Revert "MIPS: Octeon: Remove special handling of CONFIG_MIPS_ELF_APPENDED_DTB=y" Kevin Hao
@ 2021-01-19 22:06 ` Thomas Bogendoerfer
0 siblings, 0 replies; 2+ messages in thread
From: Thomas Bogendoerfer @ 2021-01-19 22:06 UTC (permalink / raw)
To: Kevin Hao; +Cc: Yasha Cherikovsky, linux-mips
On Tue, Jan 19, 2021 at 07:15:31PM +0800, Kevin Hao wrote:
> This reverts commit d9df9fb901d25b941ab2cfb5b570d91fb2abf7a3.
>
> For the OCTEON boards, it need to patch the built-in DTB before using
> it. Previously it judges if it is a built-in DTB by checking
> fw_passed_dtb. But after commit 37e5c69ffd41 ("MIPS: head.S: Init
> fw_passed_dtb to builtin DTB", the fw_passed_dtb is initialized even
> when using built-in DTB. This causes the OCTEON boards boot broken due
> to an unpatched built-in DTB is used. Revert the commit d9df9fb901d2 to
> restore the codes before the fw_passed_dtb is used and then fix this
> issue.
>
> Fixed: 37e5c69ffd41 ("MIPS: head.S: Init fw_passed_dtb to builtin DTB")
> Cc: stable@vger.kernel.org
> Suggested-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
> Signed-off-by: Kevin Hao <haokexin@gmail.com>
> ---
> arch/mips/cavium-octeon/setup.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
applied to mips-next.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-01-19 11:15 [PATCH v2] Revert "MIPS: Octeon: Remove special handling of CONFIG_MIPS_ELF_APPENDED_DTB=y" Kevin Hao
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