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| author | Gavin Shan <gwshan@linux.vnet.ibm.com> | 2017-10-19 13:43:07 +1100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-21 01:56:38 +0100 |
| commit | 100ef01f3ea4badbee6479290a41f74abd0e523f (patch) | |
| tree | 63e20dd96f1655865b98745c97f9360f826d4e87 /net/ncsi | |
| parent | 0795fb2021f07969949f523ea33c39785bfae9d6 (diff) | |
| download | linux-stable-100ef01f3ea4badbee6479290a41f74abd0e523f.tar.gz linux-stable-100ef01f3ea4badbee6479290a41f74abd0e523f.tar.bz2 linux-stable-100ef01f3ea4badbee6479290a41f74abd0e523f.zip | |
net/ncsi: Disable HWA mode when no channels are found
When there are no NCSI channels probed, HWA (Hardware Arbitration)
mode is enabled. It's not correct because HWA depends on the fact:
NCSI channels exist and all of them support HWA mode. This disables
HWA when no channels are probed.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ncsi')
| -rw-r--r-- | net/ncsi/ncsi-manage.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c index b022deb39d31..0966eff48ce7 100644 --- a/net/ncsi/ncsi-manage.c +++ b/net/ncsi/ncsi-manage.c @@ -1005,12 +1005,15 @@ static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp) struct ncsi_package *np; struct ncsi_channel *nc; unsigned int cap; + bool has_channel = false; /* The hardware arbitration is disabled if any one channel * doesn't support explicitly. */ NCSI_FOR_EACH_PACKAGE(ndp, np) { NCSI_FOR_EACH_CHANNEL(np, nc) { + has_channel = true; + cap = nc->caps[NCSI_CAP_GENERIC].cap; if (!(cap & NCSI_CAP_GENERIC_HWA) || (cap & NCSI_CAP_GENERIC_HWA_MASK) != @@ -1021,8 +1024,13 @@ static bool ncsi_check_hwa(struct ncsi_dev_priv *ndp) } } - ndp->flags |= NCSI_DEV_HWA; - return true; + if (has_channel) { + ndp->flags |= NCSI_DEV_HWA; + return true; + } + + ndp->flags &= ~NCSI_DEV_HWA; + return false; } static int ncsi_enable_hwa(struct ncsi_dev_priv *ndp) |