Messages in this thread | | | Subject | Re: solo6010 modprobe lockup since e1ceb25a (v4.3 regression) | From | Hans Verkuil <> | Date | Thu, 15 Sep 2016 15:25:03 +0200 |
| |
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
| |