On Thu, 2019-06-06 at 20:56 +1000, Benjamin Herrenschmidt wrote: > On Thu, 2019-06-06 at 12:31 +0300, Aaro Koskinen wrote: > > Hi, > > > > On Thu, Jun 06, 2019 at 10:54:51AM +1000, Benjamin Herrenschmidt > > wrote: > > > On Thu, 2019-06-06 at 01:50 +0300, Aaro Koskinen wrote: > > > > Hi, > > > > > > > > When upgrading from v5.0 -> v5.1 on G4 PowerBook, I noticed WLAN > > > > does > > > > not work anymore: > > > > > > > > [ 42.004303] b43legacy-phy0: Loading firmware version 0x127, > > > > patch level 14 (2005-04-18 02:36:27) > > > > [ 42.184837] b43legacy-phy0 debug: Chip initialized > > > > [ 42.184873] b43legacy-phy0 ERROR: The machine/kernel does not > > > > support the required 30-bit DMA mask > > > > > > > > The same happens with the current mainline. > > > > > > How much RAM do you have ? > > > > The system has 1129 MB RAM. Booting with mem=1G makes it work. > > Wow... that's an odd amount. One thing we could possibly do is add code > to limit the amount of RAM when we detect that device.... Sent too quickly... I mean that *or* force swiotlb at 30-bits on those systems based on detecting the presence of that device in the device-tree. Cheers, Ben.
