Andrey Utkin <andrey_utkin@xxxxxxxxxxxx> writes: >> Does (only) adding the >> >> pci_read_config_word(solo_dev->pdev, PCI_STATUS, &val); >> >> in solo_reg_write() help? > > Yes. > I have posted a patch with this change few days ago, I thought you have > noticed it. Well, I think you haven't sent me a copy. Anyway, it would be great to determine where exactly writes need a flush. Adding it everywhere is a bit suboptimal, one would think. Can you share some details about the machine you are experiencing the problems on? CPU, chipset? I'd try to see if I can recreate the problem. Alternatively, you could investigate yourself - at first you could put pci_read_config_word() at the end of subroutines (including return statements) using solo_reg_write(). And in that solo_p2m_dma_desc(), before wait_for_completion_timeout(). Then eliminate them using some sort of binary search to see which ones are required. -- Krzysztof Halasa Industrial Research Institute for Automation and Measurements PIAP Al. Jerozolimskie 202, 02-486 Warsaw, Poland -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
