Hi ALL my name is Ludwig Petrosyan, I am developing PCIe endpoint drivers under Ubuntu. I have got the problem and think it is on pciport driver level. I will try to describe the problem and maybe some body could help me. So: I use microTCA system with PCIe bus, there are two AMC cards (PCIe endpoints), lets call card A and card B. as well there are two device drivers for A and B. Card B has bug, after PCIe memory write operation (MWr) the card sends back Completion packet without data (Cpl) (I now it is wrong, but card designed in this way and has to be changed). User process Ua reads data from Card A in loop, everything is OK , but then I start second user process Ub which writes in loop data to card B (bugged card) the Ua gets wrong data. After improving card B the problem was solved, but could be it has to be checked on the PCIe driver level as well. with best regards Ludwig Petrosyan -- 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
