diff options
| author | Eric Anholt <eric@anholt.net> | 2010-05-07 14:30:03 -0700 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-05-10 13:36:52 -0700 |
| commit | 34dc4d4423dc342848d72be764832cbc0852854a (patch) | |
| tree | 056402a4afc2b7ef2f4dee30a712ce847279c13a /drivers/net/sfc/siena.c | |
| parent | 3d8620cc5f8538364ee152811e2bd8713abb1d58 (diff) | |
| parent | 722154e4cacf015161efe60009ae9be23d492296 (diff) | |
Merge remote branch 'origin/master' into drm-intel-next
Conflicts:
drivers/gpu/drm/i915/i915_dma.c
drivers/gpu/drm/i915/i915_drv.h
drivers/gpu/drm/radeon/r300.c
The BSD ringbuffer support that is landing in this branch
significantly conflicts with the Ironlake PIPE_CONTROL fix on master,
and requires it to be tested successfully anyway.
Diffstat (limited to 'drivers/net/sfc/siena.c')
| -rw-r--r-- | drivers/net/sfc/siena.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/net/sfc/siena.c b/drivers/net/sfc/siena.c index 38dcc42c4f7..e0c46f59d1f 100644 --- a/drivers/net/sfc/siena.c +++ b/drivers/net/sfc/siena.c @@ -456,8 +456,17 @@ static int siena_try_update_nic_stats(struct efx_nic *efx) static void siena_update_nic_stats(struct efx_nic *efx) { - while (siena_try_update_nic_stats(efx) == -EAGAIN) - cpu_relax(); + int retry; + + /* If we're unlucky enough to read statistics wduring the DMA, wait + * up to 10ms for it to finish (typically takes <500us) */ + for (retry = 0; retry < 100; ++retry) { + if (siena_try_update_nic_stats(efx) == 0) + return; + udelay(100); + } + + /* Use the old values instead */ } static void siena_start_nic_stats(struct efx_nic *efx) |