Re: [PATCH 5.14 058/162] igc: fix build errors for PTP

[Andre Tomt]

On 27.09.2021 19:01, Greg Kroah-Hartman wrote:
> From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
>
> [ Upstream commit 87758511075ec961486fe78d7548dd709b524433 ]
>
> When IGC=y and PTP_1588_CLOCK=m, the ptp_*() interface family is
> not available to the igc driver. Make this driver depend on
> PTP_1588_CLOCK_OPTIONAL so that it will build without errors.
>
> Various igc commits have used ptp_*() functions without checking
> that PTP_1588_CLOCK is enabled. Fix all of these here.
>
> Fixes these build errors:
>
> ld: drivers/net/ethernet/intel/igc/igc_main.o: in function `igc_msix_other':
> igc_main.c:(.text+0x6494): undefined reference to `ptp_clock_event'
> ld: igc_main.c:(.text+0x64ef): undefined reference to `ptp_clock_event'
> ld: igc_main.c:(.text+0x6559): undefined reference to `ptp_clock_event'
> ld: drivers/net/ethernet/intel/igc/igc_ethtool.o: in function `igc_ethtool_get_ts_info':
> igc_ethtool.c:(.text+0xc7a): undefined reference to `ptp_clock_index'
> ld: drivers/net/ethernet/intel/igc/igc_ptp.o: in function `igc_ptp_feature_enable_i225':
> igc_ptp.c:(.text+0x330): undefined reference to `ptp_find_pin'
> ld: igc_ptp.c:(.text+0x36f): undefined reference to `ptp_find_pin'
> ld: drivers/net/ethernet/intel/igc/igc_ptp.o: in function `igc_ptp_init':
> igc_ptp.c:(.text+0x11cd): undefined reference to `ptp_clock_register'
> ld: drivers/net/ethernet/intel/igc/igc_ptp.o: in function `igc_ptp_stop':
> igc_ptp.c:(.text+0x12dd): undefined reference to `ptp_clock_unregister'
> ld: drivers/platform/x86/dell/dell-wmi-privacy.o: in function `dell_privacy_wmi_probe':
>
> Fixes: 64433e5bf40ab ("igc: Enable internal i225 PPS")
> Fixes: 60dbede0c4f3d ("igc: Add support for ethtool GET_TS_INFO command")
> Fixes: 87938851b6efb ("igc: enable auxiliary PHC functions for the i225")
> Fixes: 5f2958052c582 ("igc: Add basic skeleton for PTP")
> Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> Cc: Ederson de Souza <ederson.desouza@xxxxxxxxx>
> Cc: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
> Cc: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxx>
> Cc: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx>
> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
> Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
> Cc: Jesse Brandeburg <jesse.brandeburg@xxxxxxxxx>
> Cc: intel-wired-lan@xxxxxxxxxxxxxxxx
> Acked-by: Vinicius Costa Gomes <vinicius.gomes@xxxxxxxxx>
> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
> ---
>   drivers/net/ethernet/intel/Kconfig | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig
> index 82744a7501c7..c11d974a62d8 100644
> --- a/drivers/net/ethernet/intel/Kconfig
> +++ b/drivers/net/ethernet/intel/Kconfig
> @@ -335,6 +335,7 @@ config IGC
>   	tristate "Intel(R) Ethernet Controller I225-LM/I225-V support"
>   	default n
>   	depends on PCI
> +	depends on PTP_1588_CLOCK_OPTIONAL
>   	help
>   	  This driver supports Intel(R) Ethernet Controller I225-LM/I225-V
>   	  family of adapters.

PTP_1588_CLOCK_OPTIONAL does not exist in 5.14, so this effectively 
disables the igc driver completely when applied to stable as-is.