iwlwifi: mvm: Don't fail if PPAG isn't supported

From: Miri Korenblit <miriam.rachel.korenblit@intel.com>

When we're copying the PPAG table into the cmd structure we're failing
if the table doesn't exist in ACPI or is invalid, or if the FW doesn't
support PPAG setting etc.

This is wrong because those are valid scenarios.  Fix this by not
failing in those cases.

Fixes: e8e10a37c51c ("iwlwifi: acpi: move ppag code from mvm to fw/acpi")
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/fw.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

On Tue, 2022-03-22 at 17:39 +0200, Luca Coelho wrote:
> From: Miri Korenblit <miriam.rachel.korenblit@intel.com>
> 
> When we're copying the PPAG table into the cmd structure we're failing
> if the table doesn't exist in ACPI or is invalid, or if the FW doesn't
> support PPAG setting etc.
> 
> This is wrong because those are valid scenarios.  Fix this by not
> failing in those cases.
> 
> Fixes: e8e10a37c51c ("iwlwifi: acpi: move ppag code from mvm to fw/acpi")
> Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
> Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
> Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
> ---
>  drivers/net/wireless/intel/iwlwifi/mvm/fw.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
> index 4632d3ad1a2b..e842816134f1 100644
> --- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
> +++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
> @@ -1015,8 +1015,9 @@ int iwl_mvm_ppag_send_cmd(struct iwl_mvm *mvm)
>  	int ret, cmd_size;
>  
>  	ret = iwl_read_ppag_table(&mvm->fwrt, &cmd, &cmd_size);
> +	/* Not supporting PPAG table is a valid scenario */
>  	if(ret < 0)
> -		return ret;
> +		return 0;
>  
>  	IWL_DEBUG_RADIO(mvm, "Sending PER_PLATFORM_ANT_GAIN_CMD\n");
>  	ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(PHY_OPS_GROUP,

Hi,

Jakub, this is the fix for the PPAG regression that we talked about
earlier.  If it's fine with Kalle, you can apply it directly to net-
next to expedite it.

Kalle can you ack?

Thanks!

--
Cheers,
Luca.

On Tue, 22 Mar 2022 21:36:16 +0200 Kalle Valo wrote:
> > Jakub, this is the fix for the PPAG regression that we talked about
> > earlier.  If it's fine with Kalle, you can apply it directly to net-
> > next to expedite it.  
> 
> You didn't CC netdev though so it's not visible on their patchwork.

I think we're in luck, looks like my scripts don't care which 
pw instance the series is in. Applied to net-next.

> > Kalle can you ack?  
> 
> Acked-by: Kalle Valo <kvalo@kernel.org>

Thanks everyone!