{PATCH] Firmware update using the update_flash -f <filename> results to soft lockup BUG

[Michael Neuling]

In message <4E1543B6.9060800 at linux.vnet.ibm.com> you wrote:
> Hi ,
> 
> Problem Description:
> Firmware update using the update_flash -f<filename>  results to soft lockup
> BUG
> FLASH: preparing saved firmware image for flash
> FLASH: flash image is 50141296 bytes
> FLASH: performing flash and reboot
> FLASH: this will take several minutes.  Do not power off!
> BUG: soft lockup - CPU#1 stuck for 67s! [events/1:36]
> 
> Steps to reproduce:
> 1. Check the firmware information on the machine (using ASM or lsmcode)
> 2. Update the system firmware with the update_flash command
> update_flash -f 01FL350_039_038.img
> info: Temporary side will be updated with a newer or
> identical image
> 
> Projected Flash Update Results:
> Current T Image: FL350_039
> Current P Image: FL350_039
> New T Image:     FL350_039
> New P Image:     FL350_039
> Flash image ready...rebooting the system...
> 
> Broadcast message from root at abc
> (/dev/hvc0) at 5:25 ...
> 
> The system is going down for reboot NOW!
> [root at abc /]# Stopping rhsmcertd[  OK  ]
> Stopping atd: [  OK  ]
> Stopping cups: [  OK  ]
> Stopping abrt daemon: [  OK  ]
> Stopping sshd: [  OK  ]
> Shutting down postfix: [  OK  ]
> Stopping rtas_errd (platform error handling) daemon: [  OK  ]
> Stopping crond: [  OK  ]
> Stopping automount: [  OK  ]
> Stopping HAL daemon: [  OK  ]
> Stopping iprdump: [  OK  ]
> Killing mdmonitor: [  OK  ]]
> Stopping system message bus: [  OK  ]
> Stopping rpcbind: [  OK  ]
> Stopping auditd: [  OK  ]
> Shutting down interface eth0:  [  OK  ]
> Shutting down loopback interface:  [  OK  ]
> ip6tables: Flushing firewall rules: [  OK  ]
> ip6tables: Setting chains to policy ACCEPT: filter [  OK  ]
> ip6tables: Unloading modules: [  OK  ]
> iptables: Flushing firewall rules: [  OK  ]
> iptables: Setting chains to policy ACCEPT: filter [  OK  ]
> iptables: Unloading modules: [  OK  ]
> Sending all processes the TERM signal... [  OK  ]
> Sending all processes the KILL signal... [  OK  ]
> Saving random seed:  [  OK  ]
> Turning off swap:  [  OK  ]
> Turning off quotas:  [  OK  ]
> Unmounting pipe file systems:  [  OK  ]
> Unmounting file systems:  [  OK  ]
> init: Re-executing /sbin/init
> Please stand by while rebooting the system...
> Restarting system.
> FLASH: preparing saved firmware image for flash
> FLASH: flash image is 50141296 bytes
> FLASH: performing flash and reboot
> FLASH: this will take several minutes.  Do not power off!
> BUG: soft lockup - CPU#1 stuck for 67s! [events/1:36]
> 
> This is solved by the following patch

Can you please explain how it fixes it?

Also you need a signed off by.

> 
> --- arch/powerpc/kernel/setup-common.c.orig	2011-07-01 22:41:12.952507971 -
0400
> +++ arch/powerpc/kernel/setup-common.c	2011-07-01 22:48:31.182507915 -
0400
> @@ -109,11 +109,12 @@ void machine_shutdown(void)
>   void machine_restart(char *cmd)
>   {
>   	machine_shutdown();
> -	if (ppc_md.restart)
> -		ppc_md.restart(cmd);
>   #ifdef CONFIG_SMP
> -	smp_send_stop();
> +        smp_send_stop();

Random white space change here.

>   #endif
> +	if (ppc_md.restart)
> +		ppc_md.restart(cmd);
> +	
>   	printk(KERN_EMERG "System Halted, OK to turn off power\n");
>   	local_irq_disable();
>   	while (1) ;
> 
> Thanks
> Divya
> 
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