On Tuesday 24 April 2007 08:03:03 Ashok Raj wrote: > PCI specs permit zero length reads (ZLR) even if the mapping for that region > is write only. Support for this feature is indicated by the presence of a bit > in the DMAR capability. If a particular DMAR does not support this capability > we map write-only regions as read-write. > > This option can also provides a workaround for some drivers that request > a write-only mapping when they really should request a read-write. > (We ran into one such case in eepro100.c in handling rx_ring_dma)
Better just fix the drivers instead of adding such hacks -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
