[PATCH] powerpc/powernv: Return for invalid IMC domain

[Michael Ellerman]

On Mon, 2019-05-20 at 08:57:53 UTC, Anju T Sudhakar wrote:
> Currently init_imc_pmu() can be failed either because
> an IMC unit with invalid domain(i.e an IMC node not
> supported by the kernel) is attempted a pmu-registration
> or something went wrong while registering a valid IMC unit.
> In both the cases kernel provides a 'Registration failed'
> error message.
> 
> Example:
> Log message, when trace-imc node is not supported by the kernel, and the
> skiboot supports trace-imc node.
> 
> So for kernel, trace-imc node is now an unknown domain.
> 
> [    1.731870] nest_phb5_imc performance monitor hardware support registered
> [    1.731944] nest_powerbus0_imc performance monitor hardware support registered
> [    1.734458] thread_imc performance monitor hardware support registered
> [    1.734460] IMC Unknown Device type
> [    1.734462] IMC PMU (null) Register failed
> [    1.734558] nest_xlink0_imc performance monitor hardware support registered
> [    1.734614] nest_xlink1_imc performance monitor hardware support registered
> [    1.734670] nest_xlink2_imc performance monitor hardware support registered
> [    1.747043] Initialise system trusted keyrings
> [    1.747054] Key type blacklist registered
> 
> 
> To avoid ambiguity on the error message, return for invalid domain
> before attempting a pmu registration. 
> 
> Fixes: 8f95faaac56c1 (`powerpc/powernv: Detect and create IMC device`)
> Reported-by: Pavaman Subramaniyam <pavsubra at in.ibm.com>
> Signed-off-by: Anju T Sudhakar <anju at linux.vnet.ibm.com>
> Reviewed-by: Madhavan Srinivasan <maddy at linux.vnet.ibm.com>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/b59bd3527fe3c1939340df558d7f9d56

cheers