openbcm

commit 9279f2ef9ddb2eb39fc8756f342d19a46e6abd18
parent a7f69a111118f472a4723163d32d3b304fe813f3
Author: Broadcom SDK Release <sdk.releases@broadcom.com>
Date:   Tue,  2 Apr 2019 16:45:09 -0700

SDK-175125: Resolve the incorrect mutex unlock for MMU counters reside in mul...

Devices: 56980_B0
Module: stat

Symptom:
Drop Counters has random high number even when no traffic through
logical port 1 on Tomahawk3

Resolve the incorrect mutex unlock for MMU counters reside in multiple-
instance counter tables, where the incorrect mutex unlcok causes DMA
buffer overwritten by other counter collection routines.

Diffstat:
M
sdk-6.5.16/src/soc/common/counter.c
 | 
10
++++++++++

1 file changed, 10 insertions(+), 0 deletions(-)
diff --git a/sdk-6.5.16/src/soc/common/counter.c b/sdk-6.5.16/src/soc/common/counter.c
@@ -15193,6 +15193,16 @@ soc_counter_collect_th_non_dma_entries(int unit,
                     non_dma++;
                     continue;
                 }
+#ifdef BCM_TOMAHAWK3_SUPPORT
+                if (SOC_IS_TOMAHAWK3(unit)) {
+                    if ((non_dma->flags & _SOC_COUNTER_NON_DMA_DO_DMA) &&
+                        count == 0) {
+                        COUNTER_UNLOCK(unit);
+                        sal_thread_yield();
+                        COUNTER_LOCK(unit);
+                    }
+                } else
+#endif
                 if (non_dma->flags & _SOC_COUNTER_NON_DMA_DO_DMA) {
                     COUNTER_UNLOCK(unit);
                     sal_thread_yield();