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| author | Ben Hutchings <bhutchings@solarflare.com> | 2011-06-24 20:46:31 +0100 |
|---|---|---|
| committer | Ben Hutchings <bhutchings@solarflare.com> | 2011-06-25 00:43:48 +0100 |
| commit | a7d529ae2158b5300e4aa16c21f1828bc864449b (patch) | |
| tree | 8a4442da3d52682945579ce76a9c075cf41a110b /drivers/net/sfc/falcon.c | |
| parent | 4017dbdc14af1903dc9fcba4d08b89c02325069d (diff) | |
| download | linux-a7d529ae2158b5300e4aa16c21f1828bc864449b.tar.gz linux-a7d529ae2158b5300e4aa16c21f1828bc864449b.tar.bz2 linux-a7d529ae2158b5300e4aa16c21f1828bc864449b.zip | |
sfc: Allow resets to be upgraded; use atomic ops for safety
Currently an attempt to schedule any reset is ignored if a reset
is already pending. This ignores the relative scopes - if the
requested reset is greater in scope then the scheduled reset should
be upgraded accordingly.
There are also some race conditions which could lead to a reset
request being lost. Deal with them by using atomic operations on a
bitmask. This also makes tests on reset_pending easier to get right.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Diffstat (limited to 'drivers/net/sfc/falcon.c')
| -rw-r--r-- | drivers/net/sfc/falcon.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c index 60176e873d62..a4c7830ec9b0 100644 --- a/drivers/net/sfc/falcon.c +++ b/drivers/net/sfc/falcon.c @@ -536,7 +536,7 @@ void falcon_reconfigure_mac_wrapper(struct efx_nic *efx) efx_oword_t reg; int link_speed, isolate; - isolate = (efx->reset_pending != RESET_TYPE_NONE); + isolate = !!ACCESS_ONCE(efx->reset_pending); switch (link_state->speed) { case 10000: link_speed = 3; break; |