From f58a37b2e01f91c23af457a7662f6b5a1e9f41e0 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Mon, 11 Jul 2016 21:00:45 +0200 Subject: [PATCH] efi/esrt: Use memremap not ioremap to access ESRT table in memory On ARM and arm64, ioremap() and memremap() are not interchangeable like on x86, and the use of ioremap() on ordinary RAM is typically flagged as an error if the memory region being mapped is also covered by the linear mapping, since that would lead to aliases with conflicting cacheability attributes. Since what we are dealing with is not an I/O region with side effects, using ioremap() here is arguably incorrect anyway, so let's replace it with memremap() instead. Acked-by: Peter Jones Signed-off-by: Ard Biesheuvel Cc: Leif Lindholm Cc: Mark Rutland Signed-off-by: Matt Fleming --- drivers/firmware/efi/esrt.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/firmware/efi/esrt.c b/drivers/firmware/efi/esrt.c index b93cd11f9bcc..14914074f716 100644 --- a/drivers/firmware/efi/esrt.c +++ b/drivers/firmware/efi/esrt.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -387,9 +388,9 @@ static int __init esrt_sysfs_init(void) if (!esrt_data || !esrt_data_size) return -ENOSYS; - esrt = ioremap(esrt_data, esrt_data_size); + esrt = memremap(esrt_data, esrt_data_size, MEMREMAP_WB); if (!esrt) { - pr_err("ioremap(%pa, %zu) failed.\n", &esrt_data, + pr_err("memremap(%pa, %zu) failed.\n", &esrt_data, esrt_data_size); return -ENOMEM; } -- 2.20.1