netdev - [PATCH net-next] cxgb4: Fix queue free path of ULD drivers

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Date:   Thu, 15 Mar 2018 17:34:14 +0530
From:   Ganesh Goudar <ganeshgr@...lsio.com>
To:     netdev@...r.kernel.org, davem@...emloft.net
Cc:     nirranjan@...lsio.com, indranil@...lsio.com, venkatesh@...lsio.com,
        Arjun Vynipadath <arjun@...lsio.com>,
        Casey Leedom <leedom@...lsio.com>,
        Ganesh Goudhar <ganeshgr@...lsio.com>
Subject: [PATCH net-next] cxgb4: Fix queue free path of ULD drivers

From: Arjun Vynipadath <arjun@...lsio.com>

Setting sge_uld_rxq_info to NULL in free_queues_uld().
We are referencing sge_uld_rxq_info in cxgb_up(). This
will fix a panic when interface is brought up after a
ULDq creation failure.

Fixes: 94cdb8bb993a (cxgb4: Add support for dynamic allocation
       of resources for ULD)
Signed-off-by: Arjun Vynipadath <arjun@...lsio.com>
Signed-off-by: Casey Leedom <leedom@...lsio.com>
Signed-off-by: Ganesh Goudhar <ganeshgr@...lsio.com>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c
index 6b5fea4..2d82714 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c
@@ -342,6 +342,7 @@ static void free_queues_uld(struct adapter *adap, unsigned int uld_type)
 {
 	struct sge_uld_rxq_info *rxq_info = adap->sge.uld_rxq_info[uld_type];
 
+	adap->sge.uld_rxq_info[uld_type] = NULL;
 	kfree(rxq_info->rspq_id);
 	kfree(rxq_info->uldrxq);
 	kfree(rxq_info);
-- 
2.1.0