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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>
This commit is contained in:
Linsys Contractor Mithlesh Thukral 2007-03-13 04:15:06 -08:00 committed by Jeff Garzik
parent 8b902aea40
commit b58ecad8d6
3 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/netxen/netxen_nic.h
View File

@ -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

1
drivers/net/netxen/netxen_nic_ethtool.c
View File

@ -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",

11
drivers/net/netxen/netxen_nic_init.c
View File

@ -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);