[PATCH 5.10 121/575] soc: fsl: dpio: replace smp_processor_id with raw_smp_processor_id

From: Greg Kroah-Hartman
Date: Mon Nov 15 2021 - 14:27:11 EST


From: Meng Li <Meng.Li@xxxxxxxxxxxxx>

commit e775eb9fc2a4107f03222fa48bc95c2c82427e64 upstream.

When enable debug kernel configs,there will be calltrace as below:

BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1
caller is debug_smp_processor_id+0x20/0x30
CPU: 6 PID: 1 Comm: swapper/0 Not tainted 5.10.63-yocto-standard #1
Hardware name: NXP Layerscape LX2160ARDB (DT)
Call trace:
dump_backtrace+0x0/0x1a0
show_stack+0x24/0x30
dump_stack+0xf0/0x13c
check_preemption_disabled+0x100/0x110
debug_smp_processor_id+0x20/0x30
dpaa2_io_query_fq_count+0xdc/0x154
dpaa2_eth_stop+0x144/0x314
__dev_close_many+0xdc/0x160
__dev_change_flags+0xe8/0x220
dev_change_flags+0x30/0x70
ic_close_devs+0x50/0x78
ip_auto_config+0xed0/0xf10
do_one_initcall+0xac/0x460
kernel_init_freeable+0x30c/0x378
kernel_init+0x20/0x128
ret_from_fork+0x10/0x38

Based on comment in the context, it doesn't matter whether
preemption is disable or not. So, replace smp_processor_id()
with raw_smp_processor_id() to avoid above call trace.

Fixes: c89105c9b390 ("staging: fsl-mc: Move DPIO from staging to drivers/soc/fsl")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Meng Li <Meng.Li@xxxxxxxxxxxxx>
Signed-off-by: Li Yang <leoyang.li@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/soc/fsl/dpio/dpio-service.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/soc/fsl/dpio/dpio-service.c
+++ b/drivers/soc/fsl/dpio/dpio-service.c
@@ -59,7 +59,7 @@ static inline struct dpaa2_io *service_s
* potentially being migrated away.
*/
if (cpu < 0)
- cpu = smp_processor_id();
+ cpu = raw_smp_processor_id();

/* If a specific cpu was requested, pick it up immediately */
return dpio_by_cpu[cpu];