Re: [PATCH net-next] liquidio: 'imply' ptp instead of 'select'

From: David Daney
Date: Fri Dec 02 2016 - 18:36:48 EST


On 12/02/2016 03:04 PM, Arnd Bergmann wrote:
ptp now depends on the optional POSIX_TIMERS setting and fails to build
if we select it without that:

warning: (LIQUIDIO_VF && TI_CPTS) selects PTP_1588_CLOCK which has unmet direct dependencies (NET && POSIX_TIMERS)
warning: (LIQUIDIO_VF && TI_CPTS) selects PTP_1588_CLOCK which has unmet direct dependencies (NET && POSIX_TIMERS)
ERROR: "posix_clock_unregister" [drivers/ptp/ptp.ko] undefined!
ERROR: "posix_clock_register" [drivers/ptp/ptp.ko] undefined!
ERROR: "pps_unregister_source" [drivers/ptp/ptp.ko] undefined!
ERROR: "pps_event" [drivers/ptp/ptp.ko] undefined!
ERROR: "pps_register_source" [drivers/ptp/ptp.ko] undefined!

It seems that two patches have collided here, the build failure
is a result of the combination. Changing the new option to 'imply'
as well fixes it.

Fixes: 111fc64a237f ("liquidio CN23XX: VF registration")
Fixes: d1cbfd771ce8 ("ptp_clock: Allow for it to be optional")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

I didn't know about this new "imply" thing. This seems like a plausible fix, so...

Acked-by: David Daney <david.daney@xxxxxxxxxx>

Thanks for fixing this up.


---
drivers/net/ethernet/cavium/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cavium/Kconfig b/drivers/net/ethernet/cavium/Kconfig
index bbc8bd16cb97..dcbce6cac63e 100644
--- a/drivers/net/ethernet/cavium/Kconfig
+++ b/drivers/net/ethernet/cavium/Kconfig
@@ -77,7 +77,7 @@ config OCTEON_MGMT_ETHERNET
config LIQUIDIO_VF
tristate "Cavium LiquidIO VF support"
depends on 64BIT && PCI_MSI
- select PTP_1588_CLOCK
+ imply PTP_1588_CLOCK
---help---
This driver supports Cavium LiquidIO Intelligent Server Adapter
based on CN23XX chips.