rtl8169: fix cache misalignment message on transmit.

The call to flush cache on the transmit buffer was misplaced (for very
short packets) and asked to flush less than a cacheline.

Move the flush cache call to after a short packet has been padded
to minimum length (so the padding is flushed too), and round the size
up to a cacheline.

Signed-off-by: Peter Chubb <peter.chubb@data61.csiro.au>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

diff --git a/drivers/net/rtl8169.c b/drivers/net/rtl8169.c
index 1cc0b40..a3f4423 100644 (file)
--- a/drivers/net/rtl8169.c
+++ b/drivers/net/rtl8169.c
@@ -629,11 +629,12 @@ static int rtl_send_common(pci_dev_t dev, unsigned long dev_iobase,
        /* point to the current txb incase multiple tx_rings are used */
        ptxb = tpc->Tx_skbuff[entry * MAX_ETH_FRAME_SIZE];
        memcpy(ptxb, (char *)packet, (int)length);
-       rtl_flush_buffer(ptxb, length);
 
        while (len < ETH_ZLEN)
                ptxb[len++] = '\0';
 
+       rtl_flush_buffer(ptxb, ALIGN(len, RTL8169_ALIGN));
+
        tpc->TxDescArray[entry].buf_Haddr = 0;
 #ifdef CONFIG_DM_ETH
        tpc->TxDescArray[entry].buf_addr = cpu_to_le32(