CPU is getting hang while using 3 RS485 port

pankajsolanki555 — Fri, 26 Aug 2022 12:59:12 GMT

CPU is getting hang while running the application with 3 RS485 port.

Imx8 with linux 5.4.181+ is being used and CPU is getting stuck.

Please help me to resolve this issue.

Getting below the kernel logs :

watchdog: BUG: soft lockup - CPU#0 stuck for 22s!
[ 1444.538575] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 1444.544327] rcu: 0-....: (5248 ticks this GP) idle=8d6/1/0x4000000000000004 softirq=478534/478534 fqs=2601
[ 1472.006575] watchdog: BUG: soft lockup - CPU#0 stuck for 22s!
[ 1507.550574] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 1507.556325] rcu: 0-....: (20998 ticks this GP) idle=8d6/1/0x4000000000000004 softirq=478534/478534 fqs=10386
[ 1532.006574] watchdog: BUG: soft lockup - CPU#0 stuck for 22s!
[ 1570.562574] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 1570.568324] rcu: 0-....: (36748 ticks this GP) idle=8d6/1/0x4000000000000004 softirq=478534/478534 fqs=18170
[ 1571.810625] INFO: task jbd2/dm-0-8:375 blocked for more than 120 seconds.
[ 1571.817422] Tainted: G O L 5.4.181+ #1
[ 1571.822827] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

topic CPU is getting hang while using 3 RS485 port in i.MX Processors

CPU is getting hang while using 3 RS485 port