of/fdt: run soc memory setup when early_init_dt_scan_memory fails
commit2a12187d58
upstream. If memory has been found early_init_dt_scan_memory now returns 1. If it hasn't found any memory it will return 0, allowing other memory setup mechanisms to carry on. Previously early_init_dt_scan_memory always returned 0 without distinguishing between any kind of memory setup being done or not. Any code path after the early_init_dt_scan memory call in the ramips plat_mem_setup code wouldn't be executed anymore. Making early_init_dt_scan_memory the only way to initialize the memory. Some boards, including my mt7621 based Cudy X6 board, depend on memory initialization being done via the soc_info.mem_detect function pointer. Those wouldn't be able to obtain memory and panic the kernel during early bootup with the message "early_init_dt_alloc_memory_arch: Failed to allocate 12416 bytes align=0x40". Fixes:1f012283e9
("of/fdt: Rework early_init_dt_scan_memory() to call directly") Cc: stable@vger.kernel.org Signed-off-by: Andreas Rammhold <andreas@rammhold.de> Link: https://lore.kernel.org/r/20221223112748.2935235-1-andreas@rammhold.de Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1ce70a9ef9
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@ -64,7 +64,7 @@ void __init plat_mem_setup(void)
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dtb = get_fdt();
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__dt_setup_arch(dtb);
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if (!early_init_dt_scan_memory())
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if (early_init_dt_scan_memory())
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return;
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if (soc_info.mem_detect)
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@ -1106,7 +1106,7 @@ u64 __init dt_mem_next_cell(int s, const __be32 **cellp)
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*/
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int __init early_init_dt_scan_memory(void)
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{
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int node;
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int node, found_memory = 0;
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const void *fdt = initial_boot_params;
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fdt_for_each_subnode(node, fdt, 0) {
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@ -1146,6 +1146,8 @@ int __init early_init_dt_scan_memory(void)
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early_init_dt_add_memory_arch(base, size);
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found_memory = 1;
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if (!hotpluggable)
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continue;
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@ -1154,7 +1156,7 @@ int __init early_init_dt_scan_memory(void)
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base, base + size);
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}
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}
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return 0;
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return found_memory;
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}
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int __init early_init_dt_scan_chosen(char *cmdline)
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