[PATCH 4.4 28/50] MIPS: Lantiq: Fix another request_mem_region() return code check

From: Greg Kroah-Hartman
Date: Fri Oct 06 2017 - 05:05:04 EST

4.4-stable review patch. If anyone has any objections, please let me know.


From: Arnd Bergmann <arnd@xxxxxxxx>

[ Upstream commit 98ea51cb0c8ce009d9da1fd7b48f0ff1d7a9bbb0 ]

Hauke already fixed a couple of them, but one instance remains
that checks for a negative integer when it should check
for a NULL pointer:

arch/mips/lantiq/xway/sysctrl.c: In function 'ltq_soc_init':
arch/mips/lantiq/xway/sysctrl.c:473:19: error: ordered comparison of pointer with integer zero [-Werror=extra]

Fixes: 6e807852676a ("MIPS: Lantiq: Fix check for return value of request_mem_region()")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: John Crispin <john@xxxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Patchwork: https://patchwork.linux-mips.org/patch/15043/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
arch/mips/lantiq/xway/sysctrl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/mips/lantiq/xway/sysctrl.c
+++ b/arch/mips/lantiq/xway/sysctrl.c
@@ -469,8 +469,8 @@ void __init ltq_soc_init(void)
panic("Failed to load xbar nodes from devicetree");
if (of_address_to_resource(np_xbar, 0, &res_xbar))
panic("Failed to get xbar resources");
- if (request_mem_region(res_xbar.start, resource_size(&res_xbar),
- res_xbar.name) < 0)
+ if (!request_mem_region(res_xbar.start, resource_size(&res_xbar),
+ res_xbar.name))
panic("Failed to get xbar resources");

ltq_xbar_membase = ioremap_nocache(res_xbar.start,