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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>
This commit is contained in:
Dennis Dalessandro 2017-11-06 06:39:29 -08:00 committed by Doug Ledford
parent b64581adba
commit 685894dd9b
1 changed files with 5 additions and 1 deletions
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6
drivers/infiniband/hw/hfi1/mad.c
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@ -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));