On 09/15/2016 03:19 PM, Andrey Utkin wrote: > On Thu, Sep 15, 2016 at 03:15:53PM +0200, Hans Verkuil wrote: >> It could be related to the fact that a PCI write may be delayed unless >> it is followed by a read (see also the comments in drivers/media/pci/ivtv/ivtv-driver.h). > > Thanks for explanation! > >> That was probably the reason for the pci_read_config_word in the reg_write >> code. Try putting that back (and just that). > > In this case reg_write becomes not atomic, thus spinlock would be > required again here, right? That depends on whether you can have calls to this function in parallel. But I get the feeling that it might be easier to just revert the patch. Regards, Hans -- 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
