Hi, After upgrade to Fedora 21 with 3.17.3-300.fc21.x86_64 (from 3.14.x in Fedora 19) my USB 3.0 drive (Seagate Backup+ 1TB) stopped working with USB 3.0 port (works fine with USB 2.0 port). When plug in for the first time (USB 3.0 port) I see in log: > kernel: xhci_hcd 0000:04:00.0: ERROR Transfer event for disabled endpoint or incorrect stream ring > kernel: xhci_hcd 0000:04:00.0: @0000000241eec570 11979000 00000002 05000000 01078001 On the second try system crashes: > kernel: kernel BUG at block/blk-core.c:2565! > -- Reboot -- I had no problems with kernel 3.14 on the same hardware. USB 2.0 pendrives work fine with that USB 3.0 port. Asus N43SN. > $ lspci | grep USB > 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) > 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) > 04:00.0 USB controller: Fresco Logic FL1000G USB 3.0 Host Controller (rev 04) I reported that issue some time ago in Fedora/RedHat bugzilla (https://bugzilla.redhat.com/show_bug.cgi?id=1164945) with full logs, but I wonder if it is a known problem (I haven't found similar open issues for 3.17) or maybe there is a patch I could test? Marcin -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html