On Wed, 2008-07-09 at 21:06 +0200, Miquel van Smoorenburg wrote: > On Wed, 2008-07-09 at 16:49 +0100, Alan Cox wrote: > > On Wed, 09 Jul 2008 15:15:14 +0100 > > David Howells <dhowells@xxxxxxxxxx> wrote: > > > > > Miquel van Smoorenburg <miquels@xxxxxxxxxx> wrote: > > > Maybe, but have you looked at i2o_cfg_passthru()? Take this, for example: > > > > > > /* Allocate memory for the transfer */ > > > p = kmalloc(sg_size, GFP_KERNEL); > > > ... > > > //TODO 64bit fix > > > sg[i].addr_bus = virt_to_bus(p); > > > > > > That looks distinctly dodgy. virt_to_bus() returns a 64-bit address, and as > > > > Agreed - stick | GFP_DMA32 on the end then ;) > > GFP_DMA32 doesn't work with kmalloc(), you need dma_alloc_coherent() or > pci_alloc_consistent() [here, i2o_dma_alloc() ] Yes it does ... it was specifically designed for it. GFP_DMA32 was introduced to allow this type of thing to happen (in the old days most drivers were allowed to assume kmalloc would return memory whose physical address was < 4GB; GFP_DMA32 allows that to continue while allowing kmalloc to stray beyond 4GB physical). > GFP_DMA would work though, as a quick bandaid. James -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
