qlcnic: avoid using reset_devices as it may become obsolete.

In kdump environment do not depend upon reset_devices parameter
to reset the pci function as this parameter may become obsolete.
Instead use an adapter specific mechanism to determine if the pci
function needs to be reset.

Per function refcount is maintained in driver, which is set in probe
and reset in remove handler of adapter. If the probe detects the count
as non zero then reset the function.

Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/qlcnic/qlcnic.h

@@ -923,6 +923,7 @@ struct qlcnic_ipaddr {
 #define QLCNIC_MACSPOOF			0x200
 #define QLCNIC_MAC_OVERRIDE_DISABLED	0x400
 #define QLCNIC_PROMISC_DISABLED		0x800
+#define QLCNIC_NEED_FLR			0x1000
 #define QLCNIC_IS_MSI_FAMILY(adapter) \
 	((adapter)->flags & (QLCNIC_MSI_ENABLED | QLCNIC_MSIX_ENABLED))
 

drivers/net/qlcnic/qlcnic_ctx.c

@@ -480,8 +480,10 @@ int qlcnic_fw_create_ctx(struct qlcnic_adapter *adapter)
 {
 	int err;
 
-	if (reset_devices)
+	if (adapter->flags & QLCNIC_NEED_FLR) {
 		pci_reset_function(adapter->pdev);
+		adapter->flags &= ~QLCNIC_NEED_FLR;
+	}
 
 	err = qlcnic_fw_cmd_create_rx_ctx(adapter);
 	if (err)

drivers/net/qlcnic/qlcnic_hdr.h

@@ -722,7 +722,7 @@ enum {
 #define QLCNIC_DEV_NPAR_OPER		1 /* NPAR Operational */
 #define QLCNIC_DEV_NPAR_OPER_TIMEO	30 /* Operational time out */
 
-#define QLC_DEV_CHECK_ACTIVE(VAL, FN)		((VAL) &= (1 << (FN * 4)))
+#define QLC_DEV_CHECK_ACTIVE(VAL, FN)		((VAL) & (1 << (FN * 4)))
 #define QLC_DEV_SET_REF_CNT(VAL, FN)		((VAL) |= (1 << (FN * 4)))
 #define QLC_DEV_CLR_REF_CNT(VAL, FN)		((VAL) &= ~(1 << (FN * 4)))
 #define QLC_DEV_SET_RST_RDY(VAL, FN)		((VAL) |= (1 << (FN * 4)))

drivers/net/qlcnic/qlcnic_main.c

@@ -1485,6 +1485,7 @@ qlcnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	uint8_t revision_id;
 	uint8_t pci_using_dac;
 	char brd_name[QLCNIC_MAX_BOARD_NAME_LEN];
+	u32 val;
 
 	err = pci_enable_device(pdev);
 	if (err)
@@ -1546,6 +1547,10 @@ qlcnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (err)
 		goto err_out_iounmap;
 
+	val = QLCRD32(adapter, QLCNIC_CRB_DRV_ACTIVE);
+	if (QLC_DEV_CHECK_ACTIVE(val, adapter->portnum))
+		adapter->flags |= QLCNIC_NEED_FLR;
+
 	err = adapter->nic_ops->start_firmware(adapter);
 	if (err) {
 		dev_err(&pdev->dev, "Loading fw failed.Please Reboot\n");