On February 27, 2015 2:42:29 PM EST, "Nelson, Shannon" <shannon.nel...@intel.com> wrote: >> From: nick [mailto:xerofo...@gmail.com] >> On 2015-02-27 09:16 AM, Stefan Assmann wrote: >> > On 27.02.2015 15:02, nick wrote: >> > >> > [...] >> > >> >>> i40e: Fix a bug where Rx would stop after some time >> >>> [...] >> >>> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c >> b/drivers/net/ethernet/intel/i40e/i40e_main.c >> >>> index f7464e8..ff6d94d 100644 >> >>> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c >> >>> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c >> >>> [...] >> >>> @@ -9169,6 +9178,13 @@ static int i40e_probe(struct pci_dev >*pdev, >> const struct pci_device_id *ent) >> >>> if (err) >> >>> dev_info(&pf->pdev->dev, "set phy mask fail, aq_err >> >>> %d\n", >> err); >> >>> >> >>> + msleep(75); >> >>> + err = i40e_aq_set_link_restart_an(&pf->hw, true, NULL); >> >>> + if (err) { >> >>> + dev_info(&pf->pdev->dev, "link restart failed, >> >>> aq_err=%d\n", >> >>> + pf->hw.aq.asq_last_status); >> >>> + } >> >>> + >> >>> /* The main driver is (mostly) up and happy. We need to set >this >> state >> >>> * before setting up the misc vector or we get a race and the >> vector >> >>> * ends up disabled forever. >> >>> >> >>> With this hunk removed the driver successfully unloaded/reloaded >a >> >>> couple of hundred times. Would it be safe to just remove this >hunk? >> >>> I haven't seen any negative effects by removing this yet. >> >>> >> >>> Stefan >> >>> >> >> Stefan, >> >> I wouldn't remove them yet as this does look like a valid idea to >> check to see if the link is >> >> restarting successfully. On the other hand can you try removing >the >> msleep line as this one is >> >> most likely causing the issue due to sleeping for some long in a >> probe function is generally a >> >> bad idea. >> >> Thanks, >> >> Nick >> > >> > Thanks Nick for the quick reply. I tested removing the msleep but >that >> > didn't make a difference. You actually need to remove the complete >> hunk >> > to get a stable driver reload. >> > >> > Stefan >> > >> Stefan, >> Basically there are a few things that could be going wrong >> 1. You are getting a error return for the >> function,i40e_aq_set_link_restart_an >> 2. You are trying to re able the device again when not needed >> 3. You are sending a NULL value to a field for command arguments that >> takes a 0 and not NULL >> to take no arguments >> Nick > >First of all, I would make sure you've got a short sleep in between >each load and unload in this stress test. There's a lot going on under >the covers in the Firmware that really should be allowed to settle out >before jostling it again with another load/unload command. > >It would help to know what Firmware you have on your NIC - can you give >us the output from "ethtool -i <ethX>"? > >The out-of-tree driver has just (finally!) been updated on SourceForge, >so you might give this version 1.2.37 driver a try to see if it changes >your result. That code still has the hunk in question, but protected >by a FW version check. The related patch will be headed upstream to >net-next very soon. > >Firmware updates have also just been released, but I'm not sure they've >made it to the Intel Downloads site yet. Updating your FW will make a >difference. > >sln Thanks Shannon, For the advice on there being a newer driver and firmware to test that on before reporting the bug against this driver. I am curious as to why this newer code is not up streamed to Linux next yet through. Nick -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
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