From: Rob Herring Date: Wed, 2 Apr 2014 22:52:43 +0000 (-0500) Subject: mips: xlp: copy built-in DTB out of init section X-Git-Tag: firefly_0821_release~176^2~3785^2~21^2~26 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e1b77baed6b170b190a72821b39a2e91a66f1e54;p=firefly-linux-kernel-4.4.55.git mips: xlp: copy built-in DTB out of init section The existing code is buggy because built-in DTBs are in init memory. It is also broken because the reserved bootmem was then freed after unflattening, but the unflattened tree points to data in the flat tree. Fix this by using the unflatten_and_copy_device_tree function. This removes all accesses to FDT header data by the arch code. Signed-off-by: Rob Herring Cc: Ralf Baechle Cc: linux-mips@linux-mips.org Tested-by: Grant Likely --- diff --git a/arch/mips/netlogic/xlp/dt.c b/arch/mips/netlogic/xlp/dt.c index 5754097b9cde..7f9615a712fb 100644 --- a/arch/mips/netlogic/xlp/dt.c +++ b/arch/mips/netlogic/xlp/dt.c @@ -87,22 +87,7 @@ void __init xlp_early_init_devtree(void) void __init device_tree_init(void) { - unsigned long base, size; - struct boot_param_header *fdtp = xlp_fdt_blob; - - if (!fdtp) - return; - - base = virt_to_phys(fdtp); - size = be32_to_cpu(fdtp->totalsize); - - /* Before we do anything, lets reserve the dt blob */ - reserve_bootmem(base, size, BOOTMEM_DEFAULT); - - unflatten_device_tree(); - - /* free the space reserved for the dt blob */ - free_bootmem(base, size); + unflatten_and_copy_device_tree(); } static struct of_device_id __initdata xlp_ids[] = {