From: Stefan Richter Date: Wed, 23 Jul 2014 18:08:12 +0000 (+0200) Subject: firewire: ohci: disable MSI for VIA VT6315 again X-Git-Tag: omap-for-v3.17/fixes-against-rc2~225^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d584a66279949561418c82b12bb4c055e6c25836;p=pandora-kernel.git firewire: ohci: disable MSI for VIA VT6315 again Revert half of commit d151f9854f21: If isochronous I/O is attempted with packets larget than 1 kByte, VIA VT6315 rev 01 immediately stops to generate any interrupts if MSI are used. Fix this by going back to legacy interrupts. [Thread "Isochronous streaming with VT6315 OHCI", http://marc.info/?t=139049641500003] With smaller packets, the loss of IRQs happens too but only very rarely --- rarely eneough that it was not yet possible for me to determine whether QUIRK_NO_MSI is an actual fix for this rare variation of this chip bug. I am keeping QUIRK_CYCLE_TIMER off of VT6315 rev >= 1 because this has been verified by myself with certainty. On the other hand, I am also keeping QUIRK_CYCLE_TIMER on for VT6315 rev 0 because I don't know at this time whether this revision accesses Cycle Timer non-atomically like most of the other VIA OHCIs are known to do. Reported-by: Rémy Bruno Signed-off-by: Stefan Richter --- Reading git-diff-tree failed