Bonding: return HWTSTAMP_FLAG_BONDED_PHC_INDEX to notify user space

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If the userspace program is distributed in binary form (distro package),
there is no way to know on which kernel versions it will run.

Let's only check if the flag was set when do SIOCSHWTSTAMP. And return
hwtstamp_config with flag HWTSTAMP_FLAG_BONDED_PHC_INDEX to notify
userspace whether the new feature is supported or not.

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Fixes: 085d610008 ("Bonding: force user to add HWTSTAMP_FLAG_BONDED_PHC_INDEX when get/set HWTSTAMP")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Hangbin Liu 2021-12-29 16:09:38 +08:00 • committed by Jakub Kicinski

parent 1bb412d46c

commit cfe355c56e

1 changed files with 26 additions and 16 deletions

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drivers/net/bonding/bond_main.c

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