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benet: Wait f/w POST until timeout

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While PCI card faces EEH errors, reset (usually hot reset) is
expected to recover from the EEH errors. After EEH core finishes
the reset, the driver callback (be_eeh_reset) is called and wait
the firmware to complete POST successfully. The original code would
return with error once detecting failure during POST stage. That
seems not enough.

The patch forces the driver (be_eeh_reset) to wait the firmware
completes POST until timeout, instead of returning error upon
detection POST failure immediately. Also, it would improve the
reliability of the EEH funtionality of the driver.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Acked-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gavin Shan 2013-03-03 21:48:46 +00:00 committed by David S. Miller
parent fa2b04f450
commit 66d29cbc59
1 changed files with 10 additions and 17 deletions
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27
drivers/net/ethernet/emulex/benet/be_cmds.c
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@ -473,7 +473,7 @@ static int be_mbox_notify_wait(struct be_adapter *adapter)
return 0;
}
static int be_POST_stage_get(struct be_adapter *adapter, u16 *stage)
static void be_POST_stage_get(struct be_adapter *adapter, u16 *stage)
{
u32 sem;
u32 reg = skyhawk_chip(adapter) ? SLIPORT_SEMAPHORE_OFFSET_SH :
@ -481,11 +481,6 @@ static int be_POST_stage_get(struct be_adapter *adapter, u16 *stage)
pci_read_config_dword(adapter->pdev, reg, &sem);
*stage = sem & POST_STAGE_MASK;
if ((sem >> POST_ERR_SHIFT) & POST_ERR_MASK)
return -1;
else
return 0;
}
int lancer_wait_ready(struct be_adapter *adapter)
@ -579,19 +574,17 @@ int be_fw_wait_ready(struct be_adapter *adapter)
}
do {
status = be_POST_stage_get(adapter, &stage);
if (status) {
dev_err(dev, "POST error; stage=0x%x\n", stage);
return -1;
} else if (stage != POST_STAGE_ARMFW_RDY) {
if (msleep_interruptible(2000)) {
dev_err(dev, "Waiting for POST aborted\n");
return -EINTR;
}
timeout += 2;
} else {
be_POST_stage_get(adapter, &stage);
if (stage == POST_STAGE_ARMFW_RDY)
return 0;
dev_info(dev, "Waiting for POST, %ds elapsed\n",
timeout);
if (msleep_interruptible(2000)) {
dev_err(dev, "Waiting for POST aborted\n");
return -EINTR;
}
timeout += 2;
} while (timeout < 60);
dev_err(dev, "POST timeout; stage=0x%x\n", stage);