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authorDennis Dalessandro <dennis.dalessandro@intel.com>2017-11-06 06:39:29 -0800
committerDoug Ledford <dledford@redhat.com>2017-11-13 15:53:57 -0500
commit685894dd9bd03b92803fbc72565789713f067d4c (patch)
treeac6456ad4e32e279e35bdd7ecd6f3318e09be656 /drivers
parentb64581adba467c916590c3922f64ec6c2b59a2c3 (diff)
IB/hfi1: Handle initial value of 0 for CCTI setting
When the driver is loaded it sets the default CCTI value to be 0. When the FM starts and CCA is disabled the driver sets the max value to 65535 due the driver subtracting 1 from 0 and the fact that the CCTI value is a u16. Special case the subtraction to find the index for a 0 value. Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/hw/hfi1/mad.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/hfi1/mad.c b/drivers/infiniband/hw/hfi1/mad.c
index 1277e1c929ce..cf8dba34fe30 100644
--- a/drivers/infiniband/hw/hfi1/mad.c
+++ b/drivers/infiniband/hw/hfi1/mad.c
@@ -3701,7 +3701,11 @@ static void apply_cc_state(struct hfi1_pportdata *ppd)
*new_cc_state = *old_cc_state;
- new_cc_state->cct.ccti_limit = ppd->total_cct_entry - 1;
+ if (ppd->total_cct_entry)
+ new_cc_state->cct.ccti_limit = ppd->total_cct_entry - 1;
+ else
+ new_cc_state->cct.ccti_limit = 0;
+
memcpy(new_cc_state->cct.entries, ppd->ccti_entries,
ppd->total_cct_entry * sizeof(struct ib_cc_table_entry));