From: sarveshwarb <sarveshwarb@serverengines.com>
Date: Wed, 5 Aug 2009 20:05:24 +0000 (-0700)
Subject: be2net: Patch to perform function reset at initialization
X-Git-Tag: firefly_0821_release~12983^2~469
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=14074eab8dcaa7f66d8f52612b2dcec51222bb5f;p=firefly-linux-kernel-4.4.55.git

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>
---

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;
+}
diff --git a/drivers/net/benet/be_cmds.h b/drivers/net/benet/be_cmds.h
index 5c5de3540d20..70618064ae15 100644
--- a/drivers/net/benet/be_cmds.h
+++ b/drivers/net/benet/be_cmds.h
@@ -135,6 +135,7 @@ struct be_mcc_mailbox {
 #define OPCODE_COMMON_QUERY_FIRMWARE_CONFIG		58
 #define OPCODE_COMMON_NTWK_PMAC_ADD			59
 #define OPCODE_COMMON_NTWK_PMAC_DEL			60
+#define OPCODE_COMMON_FUNCTION_RESET			61
 
 #define OPCODE_ETH_ACPI_CONFIG				2
 #define OPCODE_ETH_PROMISCUOUS				3
@@ -744,4 +745,5 @@ extern int be_cmd_set_flow_control(struct be_adapter *adapter,
 extern int be_cmd_get_flow_control(struct be_adapter *adapter,
 			u32 *tx_fc, u32 *rx_fc);
 extern int be_cmd_query_fw_cfg(struct be_adapter *adapter, u32 *port_num);
+extern int be_cmd_reset_function(struct be_adapter *adapter);
 extern void be_process_mcc(struct be_adapter *adapter);
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index ef82a52f3934..d20235b16800 100644
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -1873,6 +1873,10 @@ static int __devinit be_probe(struct pci_dev *pdev,
 	if (status)
 		goto free_netdev;
 
+	status = be_cmd_reset_function(adapter);
+	if (status)
+		goto ctrl_clean;
+
 	status = be_stats_init(adapter);
 	if (status)
 		goto ctrl_clean;