From: Ben Hutchings <bhutchings@xxxxxxxxxxxxxx> Date: Fri, 23 Aug 2013 13:44:29 +0100 > On Fri, 2013-08-23 at 12:49 +0300, Dan Carpenter wrote: >> tmpaddr[] is a six byte array. We want to set the first four bytes on >> the first line and the remaining two on the next line. The code assumes >> that "unsigned long" is 32 bits and obviously that's not true on 64 bit >> arches. It's better to just use u32 instead. >> >> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> >> --- >> This is a static checker thing and I can't compile this file. >> >> diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c >> index fdf9307..422b125 100644 >> --- a/drivers/net/ethernet/freescale/fec_main.c >> +++ b/drivers/net/ethernet/freescale/fec_main.c >> @@ -1100,9 +1100,9 @@ static void fec_get_mac(struct net_device *ndev) >> * 4) FEC mac registers set by bootloader >> */ >> if (!is_valid_ether_addr(iap)) { >> - *((unsigned long *) &tmpaddr[0]) = >> + *((u32 *) &tmpaddr[0]) = >> be32_to_cpu(readl(fep->hwp + FEC_ADDR_LOW)); >> - *((unsigned short *) &tmpaddr[4]) = >> + *((u16 *) &tmpaddr[4]) = >> be16_to_cpu(readl(fep->hwp + FEC_ADDR_HIGH) >> 16); >> iap = &tmpaddr[0]; >> } > > This code also seems to have CPU vs big-endian byte order the wrong way > round. readl() returns bytes in native order whereas we always store > MAC addresses in network (big-endian) order. So I think it should be > doing: > > *((__be32 *) &tmpaddr[0]) = > cpu_to_be32(readl(fep->hwp + FEC_ADDR_LOW)); > *((__be16 *) &tmpaddr[4]) = > cpu_to_be16(readl(fep->hwp + FEC_ADDR_HIGH) >> 16); Dan please resubmit with Ben's suggested changes, thanks. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html