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SubjectRe: [PATCH net 3/3] cpsw/netcp: work around reverse cpts dependency
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On 12/16/2016 03:19 AM, Arnd Bergmann wrote:
> The dependency is reversed: cpsw and netcp call into cpts,
> but cpts depends on the other two in Kconfig. This can lead
> to cpts being a loadable module and its callers built-in:
>
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_remove':
> cpsw.c:(.text.cpsw_remove+0xd0): undefined reference to `cpts_release'
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_rx_handler':
> cpsw.c:(.text.cpsw_rx_handler+0x2dc): undefined reference to `cpts_rx_timestamp'
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_tx_handler':
> cpsw.c:(.text.cpsw_tx_handler+0x7c): undefined reference to `cpts_tx_timestamp'
> drivers/net/ethernet/ti/cpsw.o: In function `cpsw_ndo_stop':
>
> As a workaround, I'm introducing another Kconfig symbol to
> control the compilation of cpts, while making the actual
> module controlled by a silent symbol that is =y when necessary.
>
> Fixes: 6246168b4a38 ("net: ethernet: ti: netcp: add support of cpts")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Thanks for the fix.
I've tried to test as much combination as possible,
but seems not of them:(

Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>

> ---
> drivers/net/ethernet/ti/Kconfig | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig
> index 366e29ff8605..c114efcd1575 100644
> --- a/drivers/net/ethernet/ti/Kconfig
> +++ b/drivers/net/ethernet/ti/Kconfig
> @@ -73,8 +73,8 @@ config TI_CPSW
> To compile this driver as a module, choose M here: the module
> will be called cpsw.
>
> -config TI_CPTS
> - tristate "TI Common Platform Time Sync (CPTS) Support"
> +config TI_CPTS_ENABLE
> + bool "TI Common Platform Time Sync (CPTS) Support"
> depends on TI_CPSW || TI_KEYSTONE_NETCP
> depends on POSIX_TIMERS
> select PTP_1588_CLOCK
> @@ -84,6 +84,12 @@ config TI_CPTS
> The unit can time stamp PTP UDP/IPv4 and Layer 2 packets, and the
> driver offers a PTP Hardware Clock.
>
> +config TI_CPTS
> + tristate
> + depends on TI_CPTS_ENABLE
> + default y if TI_CPSW=y || TI_KEYSTONE_NETCP=y
> + default m
> +
> config TI_KEYSTONE_NETCP
> tristate "TI Keystone NETCP Core Support"
> select TI_CPSW_ALE
>

--
regards,
-grygorii

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