Some platforms cannot invalidate the cache at four byte intervals, so
invalidate the entire descriptor.
Signed-off-by: Ian Campbell <i...@hellion.org.uk>
---
drivers/net/designware.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index 1120f70..7d14cec 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -280,10 +280,13 @@ static int dw_eth_send(struct eth_device *dev, void
*packet, int length)
u32 desc_num = priv->tx_currdescnum;
struct dmamacdescr *desc_p = &priv->tx_mac_descrtable[desc_num];
- /* Invalidate only "status" field for the following check */
- invalidate_dcache_range((unsigned long)&desc_p->txrx_status,
- (unsigned long)&desc_p->txrx_status +
- sizeof(desc_p->txrx_status));
+ /* Strictly we only need to invalidate the "status" field for
+ * the following check, but on some platforms we cannot
+ * invalidate only 4 bytes, so invalidate the the whole thing
+ * which is known to be DMA aligned. */
+ invalidate_dcache_range((unsigned long)desc_p,
+ (unsigned long)desc_p +
+ sizeof(struct dmamacdescr));
/* Check if the descriptor is owned by CPU */
if (desc_p->txrx_status & DESC_TXSTS_OWNBYDMA) {
--
1.9.0
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