diff options
| author | Vasanthy Kolluri <[email protected]> | 2010-03-18 16:19:44 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2010-03-18 21:22:47 -0700 |
| commit | a55a603dae47a1ea4fbfad3a3a428ea7a0900ab6 (patch) | |
| tree | e5a0526197efe4afb24443a2b918a8908ce11a43 /tools/perf/scripts/python/syscall-counts.py | |
| parent | ba7e94a44afbbf4c494e00b844f7bbfb144e7f6d (diff) | |
enic: Bug Fix: Fix hardware descriptor reads
The last bit written to a completion descriptor by hardware is the color
bit. Driver must read all other descriptor fields only after reading the
color bit to avoid reading stale descriptor fields. There is a rmb() after
reading the color bit to avoid any compiler/cpu reordering of the reads.
The color bit is the generation bit that toggles each pass through the
completion descriptor ring.
Signed-off-by: Scott Feldman <[email protected]>
Signed-off-by: Vasanthy Kolluri <[email protected]>
Signed-off-by: Roopa Prabhu <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions