Wind River Support Network


LIN5-5131 : [WRLinux 5.0.1 Async][fsl_t4xxx ] the serial node order get changed for kexec and kdump kernel

Created: Sep 23, 2013    Updated: Dec 19, 2017
Resolved Date: Oct 7, 2013
Found In Version: 5.0.1
Fix Version:
Severity: Standard
Applicable for: Wind River Linux 5
Component/s: BSP - Async


There are four serial node for t4240qds, When I boot up kernel via u-boot, The order which the kernel found the four serial node is jusk like the following. 
serial@11c500 ---->ttyS0
serial@11c600 ---->ttyS1
serial@11d500 ---->ttyS2
serial@11d600 ---->ttyS3
but when I was booting kernel via kexec, the order is changed.
serial@11d600 ---->ttyS0
serial@11c500 ---->ttyS1
serial@11c600 ---->ttyS2
serial@11d500 ---->ttyS3



Steps to Reproduce

1) Configure project
2) kexec -l vmlinux --append="`cat /proc/cmdline`" or kexec -p vmlinux ...
3) kexec -e or echo c >/proc/sysrq-trigger

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