MIPS: lantiq: falcon: sysctrl: fix request memory check logic

request_mem_region() will return NULL instead of error code
when the memory request fails. Therefore, we should check if
the return value is non-zero instead of less than zero. In
this way, this patch also fixes the build warnings:

arch/mips/lantiq/falcon/sysctrl.c:214:50: error: ordered comparison of pointer with integer zero [-Werror=extra]
  214 |                                 res_status.name) < 0) ||
      |                                                  ^
arch/mips/lantiq/falcon/sysctrl.c:216:47: error: ordered comparison of pointer with integer zero [-Werror=extra]
  216 |                                 res_ebu.name) < 0) ||
      |                                               ^
arch/mips/lantiq/falcon/sysctrl.c:219:50: error: ordered comparison of pointer with integer zero [-Werror=extra]
  219 |                                 res_sys[0].name) < 0) ||
      |                                                  ^
arch/mips/lantiq/falcon/sysctrl.c:222:50: error: ordered comparison of pointer with integer zero [-Werror=extra]
  222 |                                 res_sys[1].name) < 0) ||
      |                                                  ^
arch/mips/lantiq/falcon/sysctrl.c:225:50: error: ordered comparison of pointer with integer zero [-Werror=extra]
  225 |                                 res_sys[2].name) < 0))
      |

Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

diff --git a/arch/mips/lantiq/falcon/sysctrl.c b/arch/mips/lantiq/falcon/sysctrl.c
index 9a8616c36500810336654a9b374b51880cdff19e..577e6e6309a670f3bd9098091e97298351debdad 100644 (file)
--- a/arch/mips/lantiq/falcon/sysctrl.c
+++ b/arch/mips/lantiq/falcon/sysctrl.c
@@ -210,19 +210,16 @@ void __init ltq_soc_init(void)
        of_node_put(np_syseth);
        of_node_put(np_sysgpe);
 
-       if ((request_mem_region(res_status.start, resource_size(&res_status),
-                               res_status.name) < 0) ||
-               (request_mem_region(res_ebu.start, resource_size(&res_ebu),
-                               res_ebu.name) < 0) ||
-               (request_mem_region(res_sys[0].start,
-                               resource_size(&res_sys[0]),
-                               res_sys[0].name) < 0) ||
-               (request_mem_region(res_sys[1].start,
-                               resource_size(&res_sys[1]),
-                               res_sys[1].name) < 0) ||
-               (request_mem_region(res_sys[2].start,
-                               resource_size(&res_sys[2]),
-                               res_sys[2].name) < 0))
+       if ((!request_mem_region(res_status.start, resource_size(&res_status),
+                                res_status.name)) ||
+           (!request_mem_region(res_ebu.start, resource_size(&res_ebu),
+                                res_ebu.name)) ||
+           (!request_mem_region(res_sys[0].start, resource_size(&res_sys[0]),
+                                res_sys[0].name)) ||
+           (!request_mem_region(res_sys[1].start, resource_size(&res_sys[1]),
+                                res_sys[1].name)) ||
+           (!request_mem_region(res_sys[2].start, resource_size(&res_sys[2]),
+                                res_sys[2].name)))
                pr_err("Failed to request core resources");
 
        status_membase = ioremap(res_status.start,