[PATCH v1 03/11] powerpc/code-patching: Fix error handling in do_patch_instruction()

[Christophe Leroy <christophe.leroy@csgroup.eu>]

Use real errors instead of using -1 as error, so that errors
returned by callees can be used towards callers.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/lib/code-patching.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c
index 7bb8dd2dc19e..4ce2b6457757 100644
--- a/arch/powerpc/lib/code-patching.c
+++ b/arch/powerpc/lib/code-patching.c
@@ -85,19 +85,13 @@ void __init poking_init(void)
 static int map_patch_area(void *addr, unsigned long text_poke_addr)
 {
 	unsigned long pfn;
-	int err;
 
 	if (is_vmalloc_or_module_addr(addr))
 		pfn = vmalloc_to_pfn(addr);
 	else
 		pfn = __pa_symbol(addr) >> PAGE_SHIFT;
 
-	err = map_kernel_page(text_poke_addr, (pfn << PAGE_SHIFT), PAGE_KERNEL);
-
-	if (err)
-		return -1;
-
-	return 0;
+	return map_kernel_page(text_poke_addr, (pfn << PAGE_SHIFT), PAGE_KERNEL);
 }
 
 static inline int unmap_patch_area(unsigned long addr)
@@ -156,10 +150,9 @@ static int do_patch_instruction(u32 *addr, ppc_inst_t instr)
 	local_irq_save(flags);
 
 	text_poke_addr = (unsigned long)__this_cpu_read(text_poke_area)->addr;
-	if (map_patch_area(addr, text_poke_addr)) {
-		err = -1;
+	err = map_patch_area(addr, text_poke_addr);
+	if (err)
 		goto out;
-	}
 
 	patch_addr = (u32 *)(text_poke_addr + (kaddr & ~PAGE_MASK));
 
-- 
2.33.1