MIPS: Lantiq: fix missing xbar kernel panic

Commit 08b3c894e565 ("MIPS: lantiq: Disable xbar fpi burst mode")
accidentally requested the resources from the pmu address region
instead of the xbar registers region, but the check for the return
value of request_mem_region() was wrong. Commit 98ea51cb0c8c ("MIPS:
Lantiq: Fix another request_mem_region() return code check") fixed the
check of the return value of request_mem_region() which made the kernel
panics.
This patch now makes use of the correct memory region for the cross bar.

Fixes: 08b3c894e565 ("MIPS: lantiq: Disable xbar fpi burst mode")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: John Crispin <john@phrozen.org>
Cc: james.hogan@imgtec.com
Cc: arnd@arndb.de
Cc: sergei.shtylyov@cogentembedded.com
Cc: john@phrozen.org
Cc: <stable@vger.kernel.org> # 4.4.x-
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15751
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/lantiq/xway/sysctrl.c b/arch/mips/lantiq/xway/sysctrl.c
index 3c3aa05891dd78dd336ca80524870e21df6380ff..95bec460b651fd1cdad1b1e262463408742c7795 100644 (file)
--- a/arch/mips/lantiq/xway/sysctrl.c
+++ b/arch/mips/lantiq/xway/sysctrl.c
@@ -467,7 +467,7 @@ void __init ltq_soc_init(void)
 
                if (!np_xbar)
                        panic("Failed to load xbar nodes from devicetree");
-               if (of_address_to_resource(np_pmu, 0, &res_xbar))
+               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))