nfp: add a helper for wrapping descriptor index

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We have a number of places where we calculate the descriptor
index based on a value which may have overflown.  Create a
macro for masking with the ring size.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

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Jakub Kicinski 2017-05-15 17:55:22 -07:00 • committed by David S. Miller

parent abeeec4adf

commit 4aa3b7660a

2 changed files with 13 additions and 11 deletions

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3

drivers/net/ethernet/netronome/nfp/nfp_net.h

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21

drivers/net/ethernet/netronome/nfp/nfp_net_common.c

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