From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Sun, 17 Dec 2006 23:29:57 +0000 (+0000)
Subject: [ARM] Fix BUG()s in ioremap() code
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c924aff853bdc1c9841dd22440f931fba5ab3a59;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[ARM] Fix BUG()s in ioremap() code

We need to ensure that the area size is page aligned so that
remap_area_pte() doesn't increment the address past the end of
the desired area.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 3bb3951920bc..251685fe73a8 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -292,6 +292,8 @@ __ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
 	if (pfn >= 0x100000 && (__pfn_to_phys(pfn) & ~SUPERSECTION_MASK))
 		return NULL;
 
+	size = PAGE_ALIGN(size);
+
  	area = get_vm_area(size, VM_IOREMAP);
  	if (!area)
  		return NULL;