Re: [PATCH] powerpc/4xx: Workaround for PPC440EPx/GRx PCI_28 Errata

2008-06-12 Thread Josh Boyer
On Thu, 12 Jun 2008 16:24:13 +0200 Stefan Roese <[EMAIL PROTECTED]> wrote: > On Wednesday 11 June 2008, Josh Boyer wrote: > > The 440EPx/GRx chips don't support PCI MRM commands. Drivers determine > > this by looking for a zero value in the PCI cache line size register. > > However, some drivers

Re: [PATCH] powerpc/4xx: Workaround for PPC440EPx/GRx PCI_28 Errata

2008-06-12 Thread Stefan Roese
On Wednesday 11 June 2008, Josh Boyer wrote: > The 440EPx/GRx chips don't support PCI MRM commands. Drivers determine > this by looking for a zero value in the PCI cache line size register. > However, some drivers write to this register upon initialization. This can > cause MRMs to be used on th

[PATCH] powerpc/4xx: Workaround for PPC440EPx/GRx PCI_28 Errata

2008-06-11 Thread Josh Boyer
The 440EPx/GRx chips don't support PCI MRM commands. Drivers determine this by looking for a zero value in the PCI cache line size register. However, some drivers write to this register upon initialization. This can cause MRMs to be used on these chips, which may cause deadlocks on PLB4. The wo