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.kagst...@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",
--
1.6.0.4
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