be2net: Patch to perform function reset at initialization

This patch is a bug fix to avoid system going into a bad state when
driver is loaded in context of kdump kernel. The patch fixes the issue
by performing a soft reset of pci function at probe time.

Signed-off-by: sarveshwarb <sarveshwarb@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/net/benet/be_cmds.c b/drivers/net/benet/be_cmds.c
index de107732dcdc..2547ee296a7d 100644
--- a/drivers/net/benet/be_cmds.c
+++ b/drivers/net/benet/be_cmds.c
@@ -1019,3 +1019,24 @@ int be_cmd_query_fw_cfg(struct be_adapter *adapter, u32 *port_num)
         spin_unlock(&adapter->mbox_lock);
         return status;
 }
+
+int be_cmd_reset_function(struct be_adapter *adapter)
+{
+        struct be_mcc_wrb *wrb = wrb_from_mbox(&adapter->mbox_mem);
+        struct be_cmd_req_hdr *req = embedded_payload(wrb);
+        int status;
+
+        spin_lock(&adapter->mbox_lock);
+
+        memset(wrb, 0, sizeof(*wrb));
+
+        be_wrb_hdr_prepare(wrb, sizeof(*req), true, 0);
+
+        be_cmd_hdr_prepare(req, CMD_SUBSYSTEM_COMMON,
+                OPCODE_COMMON_FUNCTION_RESET, sizeof(*req));
+
+        status = be_mbox_notify(adapter);
+
+        spin_unlock(&adapter->mbox_lock);
+        return status;
+}