ixgbe: drop ring->head, make ring->tail a pointer instead of offset

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This change drops ring->head since it is not used in any hot-path and can
easily be determined using IXGBE_[RT]DH(ring->reg_idx).

It also changes ring->tail into a true pointer so we can avoid unnecessary
pointer math to find the location of the tail.

In addition I also dropped the setting of head and tail in
ixgbe_clean_[rx|tx]_ring. The only location that should be setting the head
and tail values is ixgbe_configure_[rx|tx]_ring and that is only while the
queue is disabled.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

...

This commit is contained in:

Alexander Duyck 2010-11-16 19:26:49 -08:00 • committed by Jeff Kirsher

parent d5f398ed73

commit 84ea2591e4

2 changed files with 11 additions and 27 deletions

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3

drivers/net/ixgbe/ixgbe.h

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35

drivers/net/ixgbe/ixgbe_main.c

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