[PATCH] powerpc/hmi: Fix kernel hang when TB is in error state.

[Michael Ellerman]

On Mon, 2019-03-04 at 19:42:19 UTC, Mahesh J Salgaonkar wrote:
> From: Mahesh Salgaonkar <mahesh at linux.vnet.ibm.com>
> 
> On TOD/TB errors timebase register stops/freezes until HMI error recovery
> gets TOD/TB back into running state. On successful recovery, TB starts
> running again and udelay() that relies on TB value continues to function
> properly. But in case when HMI fails to recover from TOD/TB errors, the
> TB register stay freezed. With TB not running the __delay() function
> keeps looping and never return. If __delay() is called while in panic
> path then system hangs and never reboots after panic.
> 
> Signed-off-by: Mahesh Salgaonkar <mahesh at linux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/de269129a48a2d590ba1d20c719e19d8

cheers