Fix compiler optimization bug for kwgbe_send
kwgbe_send/recv both have loops waiting for the hardware to set a bit. GCC 4.3.3 cleverly optimizes the send case to ... a while(1); loop. This patch makes the structure volatile to force re-loading of the transmit descriptor.
Signed-off-by: Simon Kagstrom simon.kagstrom@netinsight.net --- drivers/net/kirkwood_egiga.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/kirkwood_egiga.c b/drivers/net/kirkwood_egiga.c index 3c5db19..db55d9d 100644 --- a/drivers/net/kirkwood_egiga.c +++ b/drivers/net/kirkwood_egiga.c @@ -484,9 +484,9 @@ static int kwgbe_halt(struct eth_device *dev) static int kwgbe_send(struct eth_device *dev, volatile void *dataptr, int datasize) { - struct kwgbe_device *dkwgbe = to_dkwgbe(dev); - struct kwgbe_registers *regs = dkwgbe->regs; - struct kwgbe_txdesc *p_txdesc = dkwgbe->p_txdesc; + volatile struct kwgbe_device *dkwgbe = to_dkwgbe(dev); + volatile struct kwgbe_registers *regs = dkwgbe->regs; + volatile struct kwgbe_txdesc *p_txdesc = dkwgbe->p_txdesc;
if ((u32) dataptr & 0x07) { printf("Err..(%s) xmit dataptr not 64bit aligned\n",