NetXen: Fix softlockup seen during hardware access

NetXen: This will fix a softlock seen on some machines.
The reason was too much time was spent waiting for hardware access
to go through.

Signed-off by: Mithlesh Thukral <[e-mail]>

Signed-off-by: Jeff Garzik <[e-mail]>

drivers/net/netxen/netxen_nic.h

···
 #define MPORT_SINGLE_FUNCTION_MODE 0x1111
 
 extern unsigned long long netxen_dma_mask;
+extern unsigned long last_schedule_time;
 
 /*
  * NetXen host-peg signal message structure

drivers/net/netxen/netxen_nic_ethtool.c

···
 		}
 		printk(KERN_INFO "%s: flash unlocked. \n", 
 			netxen_nic_driver_name);
+		last_schedule_time = jiffies;
 		ret = netxen_flash_erase_secondary(adapter);
 		if (ret != FLASH_SUCCESS) {
 			printk(KERN_ERR "%s: Flash erase failed.\n", 

drivers/net/netxen/netxen_nic_init.c

···
 	u32 data;
 };
 
+unsigned long last_schedule_time;
+
 #define NETXEN_MAX_CRB_XFORM 60
 static unsigned int crb_addr_xform[NETXEN_MAX_CRB_XFORM];
 #define NETXEN_ADDR_ERROR (0xffffffff)
···
 static inline int
 do_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp)
 {
+	if (jiffies > (last_schedule_time + (8 * HZ))) {
+		last_schedule_time = jiffies;
+		schedule();
+	}
+
 	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ADDRESS, addr);
 	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 3);
-	udelay(70);		/* prevent bursting on CRB */
+	udelay(100);		/* prevent bursting on CRB */
 	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
 	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_INSTR_OPCODE, 0xb);
 	if (netxen_wait_rom_done(adapter)) {
···
 	}
 	/* reset abyte_cnt and dummy_byte_cnt */
 	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_ABYTE_CNT, 0);
-	udelay(70);		/* prevent bursting on CRB */
+	udelay(100);		/* prevent bursting on CRB */
 	netxen_nic_reg_write(adapter, NETXEN_ROMUSB_ROM_DUMMY_BYTE_CNT, 0);
 
 	*valp = netxen_nic_reg_read(adapter, NETXEN_ROMUSB_ROM_RDATA);