> -----Original Message----- > From: Yuval Mintz [mailto:yuvalmin@xxxxxxxxxxxx] > Sent: Sunday, August 25, 2013 4:22 AM > To: Keller, Jacob E > Cc: bhelgaas@xxxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx; > netdev@xxxxxxxxxxxxxxx > Subject: pcie_get_minimum_link returns 0 width > > Hi, > > I tried adding support for the newly added 'pcie_get_minimum_link' into > the > bnx2x driver, but found out the some of my devices started showing > width x0. > > By adding debug prints, I've found out there were devices up the chain > that > Showed 0 when their PCI_EXP_LNKSTA was read by said function. > However, when I tried looking via lspci the output claimed the width was > x4. > > lspci -vt output: > [0000:00]-+-00.0 Intel Corporation 5000P Chipset Memory Controller > Hub > +-02.0-[09-12]--+-00.0-[0a-11]--+-00.0-[0b-0d]-- > +-01.0-[0e-10]--+-00.0 > Broadcom > Corporation NetXtreme II > BCM57710 > 10-Gigabit PCIe [Everest] > > Where: > 00:02.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x4 > Port > 2 (rev 93) > 09:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express > Upstream > Port (rev 01) > 0a:01.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express > Downstream Port E2 (rev 01) > 0e:00.0 Ethernet controller: Broadcom Corporation NetXtreme II > BCM57710 > 10-Gigabit PCIe [Everest] (rev 01) > > The output for "lspci -vvvv | grep LnkSta for all four is: > LnkSta: Speed 2.5GT/s, Width x4, TrErr- Train- SlotClk+ DLActive- > BWMgmt- > ABWMgmt- > > But added prints inside the function's loop show: > LnkSta 1041 [000e:00.00] > LnkSta 0000 [000a:01.00] > LnkSta 0000 [0009:00.00] > LnkSta 3041 [0000:02.00] > (PCI_EXP_LNKSTA value, bus->number, PCI_SLOT, PCI_FUNC) > > Thanks, > Yuval Interesting... It looks like the entire LnkSta read failed for the two in the middle.. I don't know how much I can help on this issue because I don't have a machine that exhibits this symptom.. Any suggestions? Regards, Jake -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
