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 <mithlesh@netxen.com>

Signed-off-by: Jeff Garzik <jeff@garzik.org>

3 files changed, 11 insertions, 2 deletions

diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index 81742e4e5610..dd8ce35332fe 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -232,6 +232,7 @@ enum {
 #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
diff --git a/drivers/net/netxen/netxen_nic_ethtool.c b/drivers/net/netxen/netxen_nic_ethtool.c
index 986ef98db229..ee1b5a24cbe7 100644
--- a/drivers/net/netxen/netxen_nic_ethtool.c
+++ b/drivers/net/netxen/netxen_nic_ethtool.c
@@ -462,6 +462,7 @@ netxen_nic_set_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom,
                 }
                 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", 
diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c
index 586d32b676af..229aa1c4fb79 100644
--- a/drivers/net/netxen/netxen_nic_init.c
+++ b/drivers/net/netxen/netxen_nic_init.c
@@ -42,6 +42,8 @@ struct crb_addr_pair {
         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)
@@ -404,9 +406,14 @@ static inline int do_rom_fast_write(struct netxen_adapter *adapter, int addr,
 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)) {
@@ -415,7 +422,7 @@ do_rom_fast_read(struct netxen_adapter *adapter, int addr, int *valp)
         }
         /* 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);