From: Kumar Sanghvi <kuma...@chelsio.com>
When creating offload server entries, an IPv6 passive connection request
can trigger a reply with a null STID, whereas the driver would expect
the reply 'STID to match the value used for the request.
This happens due to h/w limitation on T4 and T5.
This patch ensures that STID 0 is never used if the stid range starts
from zero.
Based on original work by Santosh Rastapur <sant...@chelsio.com>
Signed-off-by: Hariprasad Shenai <haripra...@chelsio.com>
Signed-off-by: Kumar Sanghvi <kuma...@chelsio.com>
---
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index f9f0505..f1015ee 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -3138,6 +3138,7 @@ static int tid_init(struct tid_info *t)
size_t size;
unsigned int stid_bmap_size;
unsigned int natids = t->natids;
+ struct adapter *adap = container_of(t, struct adapter, tids);
stid_bmap_size = BITS_TO_LONGS(t->nstids + t->nsftids);
size = t->ntids * sizeof(*t->tid_tab) +
@@ -3172,6 +3173,11 @@ static int tid_init(struct tid_info *t)
t->afree = t->atid_tab;
}
bitmap_zero(t->stid_bmap, t->nstids + t->nsftids);
+ /* Reserve stid 0 for T4/T5 adapters */
+ if (!t->stid_base &&
+ (is_t4(adap->params.chip) || is_t5(adap->params.chip)))
+ __set_bit(0, t->stid_bmap);
+
return 0;
}
--
1.8.0
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