fixup! net: macb: add XDP support for gem

macb_xdp_submit_frame() writes TSTART without first waking the MAC from
LPI. When EEE is active, TXLPIEN blocks all TX and the GEM MAC has no
auto-wake mechanism, so XDP frames will stall in the FIFO indefinitely.

Add macb_tx_lpi_wake() before TSTART, matching the regular TX path in
macb_start_xmit(). It's a no-op when EEE is not active.

Signed-off-by: Nicolai Buchwitz <nb@tipi-net.de>

Author: nbuchwitz

drivers/net/ethernet/cadence/macb_main.c

@@ -1691,6 +1691,7 @@ static int macb_xdp_submit_frame(struct macb *bp, struct xdp_frame *xdpf,
 	wmb();
 
 	spin_lock(&bp->lock);
+	macb_tx_lpi_wake(bp);
 	macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
 	spin_unlock(&bp->lock);