Hi,
Using Linux kernel v4.18-rc8, I am unable to bind a PCI device to
uio_pci_generic. This works fine with v4.18-rc4. dmesg shows:
[ 336.221585] genirq: Threaded irq requested with handler=NULL and !ONESHOT
for irq 33
[ 336.221681] uio_pci_generic: probe of 0000:04:00.0 failed with error -22
This problem has been reproduced on multiple systems.
This seems to be related to commit 9421e45f5 (“uio: use request_threaded_irq
instead”) which was merged in -rc5. Reverting this commit fixes the issue (I
also reverted 543af5861f and 57c5f4df0a which also touch uio.c - just to be
safe).
This seems like a serious regression to uio_pci_generic, but any tips or
pointers would be appreciated.
Thanks,
Jim Harris
