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be2net: fix a bug in UE detection logic

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The ONLINE registers can return 0xFFFFFFFF on more than one
occassion. On systems that care, reading these registers could
lead to problems.

So the new code decides that the ASIC has encountered and error
by reading the UE_STATUS_LOW/HIGH registers. AND them with
the mask values and a non-zero result indicates an error.

Signed-off-by: Ajit Khaparde <ajitk@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ajit Khaparde
2010-09-03 06:23:30 +00:00
committed by David S. Miller
parent 1ef78abec6
commit d053de911b
3 changed files with 10 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/net/benet/be_main.c
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@@ -1750,26 +1750,7 @@ static int be_poll_tx_mcc(struct napi_struct *napi, int budget)
return 1;
}
static inline bool be_detect_ue(struct be_adapter *adapter)
{
u32 online0 = 0, online1 = 0;
pci_read_config_dword(adapter->pdev, PCICFG_ONLINE0, &online0);
pci_read_config_dword(adapter->pdev, PCICFG_ONLINE1, &online1);
if (!online0 || !online1) {
adapter->ue_detected = true;
dev_err(&adapter->pdev->dev,
"UE Detected!! online0=%d online1=%d\n",
online0, online1);
return true;
}
return false;
}
void be_dump_ue(struct be_adapter *adapter)
void be_detect_dump_ue(struct be_adapter *adapter)
{
u32 ue_status_lo, ue_status_hi, ue_status_lo_mask, ue_status_hi_mask;
u32 i;
@@ -1786,6 +1767,11 @@ void be_dump_ue(struct be_adapter *adapter)
ue_status_lo = (ue_status_lo & (~ue_status_lo_mask));
ue_status_hi = (ue_status_hi & (~ue_status_hi_mask));
if (ue_status_lo || ue_status_hi) {
adapter->ue_detected = true;
dev_err(&adapter->pdev->dev, "UE Detected!!\n");
}
if (ue_status_lo) {
for (i = 0; ue_status_lo; ue_status_lo >>= 1, i++) {
if (ue_status_lo & 1)
@@ -1821,10 +1807,8 @@ static void be_worker(struct work_struct *work)
adapter->rx_post_starved = false;
be_post_rx_frags(adapter);
}
if (!adapter->ue_detected) {
if (be_detect_ue(adapter))
be_dump_ue(adapter);
}
if (!adapter->ue_detected)
be_detect_dump_ue(adapter);
schedule_delayed_work(&adapter->work, msecs_to_jiffies(1000));
}