On 11/12/2009 03:51 AM, Christian Lamparter wrote: > On Thursday 12 November 2009 01:02:29 Larry Finger wrote: >> On 2.6.32-rc6 from wireless-testing, the following warning is emitted: >> >> ------------[ cut here ]------------ >> WARNING: at lib/dma-debug.c:860 check_for_stack+0xaa/0xe0() >> Hardware name: HP Pavilion dv2700 Notebook PC >> ehci_hcd 0000:00:02.1: DMA-API: device driver maps memory fromstack >> [addr=ffff8800b6e2bca8] -- snip -- > > Acked-by: Christian Lamparter <chunkeey@xxxxxxxxxxxxxx> > > FYI, p54u_upload_firmware_net2280 will likely produce the same > same WARN, since "__le32 reg;" is held on the stack as well. I was pretty certain that the WARN is only for DMA buffers on the stack. After reviewing the code lib/dma-debug.c, nothing changed my mind. In p54u_upload_firmware_net2280, the buffer is kmalloc'ed already. It should be OK. Larry -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
