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| author | Vivien Didelot <vivien.didelot@savoirfairelinux.com> | 2017-10-26 11:22:51 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-28 00:00:09 +0900 |
| commit | bff7b688d5b10a8cb8cecefdea5e255408b78f2f (patch) | |
| tree | 4a75ab18d7dcce75a12d337fb10693a3821b444a /include/net | |
| parent | 5bca178eed601cd4584c38c5290f7abbcacf3fb3 (diff) | |
| download | lwn-bff7b688d5b10a8cb8cecefdea5e255408b78f2f.tar.gz lwn-bff7b688d5b10a8cb8cecefdea5e255408b78f2f.zip | |
net: dsa: add dsa_is_unused_port helper
As the comment above the chunk states, the b53 driver attempts to
disable the unused ports. But using ds->enabled_port_mask is misleading,
because this mask reports in fact the user ports.
To avoid confusion and fix this, this patch introduces an explicit
dsa_is_unused_port helper which ensures the corresponding bit is not
masked in any of the switch port masks.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/dsa.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/net/dsa.h b/include/net/dsa.h index 38961ef91d3d..6b1bc1c8f7e2 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -254,6 +254,13 @@ struct dsa_switch { struct dsa_port ports[]; }; +static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) +{ + u32 m = ds->enabled_port_mask | ds->dsa_port_mask | ds->cpu_port_mask; + + return !(m & BIT(p)); +} + static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) { return !!(ds->cpu_port_mask & (1 << p)); |