diff options
| author |   Claudiu Manoil <claudiu.manoil@freescale.com> | 2014-10-07 10:44:33 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-10-09 01:40:37 -0400 |
| commit | 83bfc3c4765c35ef0dfff8a3d6dedab88f3f50ea (patch) | |
| tree | dcdf7fd08ae731364ea09aef2fa725b6b3e6e597 /drivers/net/ethernet/freescale/gianfar.c | |
| parent | gianfar: Exclude PPC specific errata handling from ARM builds (diff) | |
| download | linux-dev-83bfc3c4765c35ef0dfff8a3d6dedab88f3f50ea.tar.xz linux-dev-83bfc3c4765c35ef0dfff8a3d6dedab88f3f50ea.zip | |
gianfar: Make MAC addr setup endian safe, cleanup
Fix the 32-bit memory access that is not endian safe,
i.e. not giving the desired byte layout for a LE CPU:
tempval = *((u32 *) (tmpbuf + 4)), where 'char tmpbuf[]'.
Get rid of rendundant local vars (tmpbuf[] and idx) and
forced casts. Cleanup comments.
Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/freescale/gianfar.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c index 37e060478630..961198a2bfa8 100644 --- a/drivers/net/ethernet/freescale/gianfar.c +++ b/drivers/net/ethernet/freescale/gianfar.c @@ -3248,22 +3248,21 @@ static void gfar_set_mac_for_addr(struct net_device *dev, int num, { struct gfar_private *priv = netdev_priv(dev); struct gfar __iomem *regs = priv->gfargrp[0].regs; - int idx; - char tmpbuf[ETH_ALEN]; u32 tempval; u32 __iomem *macptr = ®s->macstnaddr1; macptr += num*2; - /* Now copy it into the mac registers backwards, cuz - * little endian is silly + /* For a station address of 0x12345678ABCD in transmission + * order (BE), MACnADDR1 is set to 0xCDAB7856 and + * MACnADDR2 is set to 0x34120000. */ - for (idx = 0; idx < ETH_ALEN; idx++) - tmpbuf[ETH_ALEN - 1 - idx] = addr[idx]; + tempval = (addr[5] << 24) | (addr[4] << 16) | + (addr[3] << 8) | addr[2]; - gfar_write(macptr, *((u32 *) (tmpbuf))); + gfar_write(macptr, tempval); - tempval = *((u32 *) (tmpbuf + 4)); + tempval = (addr[1] << 24) | (addr[0] << 16); gfar_write(macptr+1, tempval); } |