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net: stmmac: Fix bad RX timestamp extraction

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[ Upstream commit a176245699 ]

As noted in dwmac4_wrback_get_rx_timestamp_status the timestamp is found
in the context descriptor following the current descriptor. However the
current code looks for the context descriptor in the current
descriptor, which will always fail.

Signed-off-by: Fredrik Hallenberg <megahallon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Fredrik Hallenberg
2017-12-18 23:34:00 +01:00
committed by Greg Kroah-Hartman
parent 06dcd2d77a
commit 11be1c24a6
5 changed files with 8 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/stmicro/stmmac/common.h
View File

@@ -409,7 +409,7 @@ struct stmmac_desc_ops {
/* get timestamp value */
u64(*get_timestamp) (void *desc, u32 ats);
/* get rx timestamp status */
int (*get_rx_timestamp_status) (void *desc, u32 ats);
int (*get_rx_timestamp_status)(void *desc, void *next_desc, u32 ats);
/* Display ring */
void (*display_ring)(void *head, unsigned int size, bool rx);
/* set MSS via context descriptor */

5
drivers/net/ethernet/stmicro/stmmac/dwmac4_descs.c
View File

@@ -258,7 +258,8 @@ static int dwmac4_rx_check_timestamp(void *desc)
return ret;
}
static int dwmac4_wrback_get_rx_timestamp_status(void *desc, u32 ats)
static int dwmac4_wrback_get_rx_timestamp_status(void *desc, void *next_desc,
u32 ats)
{
struct dma_desc *p = (struct dma_desc *)desc;
int ret = -EINVAL;
@@ -270,7 +271,7 @@ static int dwmac4_wrback_get_rx_timestamp_status(void *desc, u32 ats)
/* Check if timestamp is OK from context descriptor */
do {
ret = dwmac4_rx_check_timestamp(desc);
ret = dwmac4_rx_check_timestamp(next_desc);
if (ret < 0)
goto exit;
i++;

3
drivers/net/ethernet/stmicro/stmmac/enh_desc.c
View File

@@ -400,7 +400,8 @@ static u64 enh_desc_get_timestamp(void *desc, u32 ats)
return ns;
}
static int enh_desc_get_rx_timestamp_status(void *desc, u32 ats)
static int enh_desc_get_rx_timestamp_status(void *desc, void *next_desc,
u32 ats)
{
if (ats) {
struct dma_extended_desc *p = (struct dma_extended_desc *)desc;

2
drivers/net/ethernet/stmicro/stmmac/norm_desc.c
View File

@@ -265,7 +265,7 @@ static u64 ndesc_get_timestamp(void *desc, u32 ats)
return ns;
}
static int ndesc_get_rx_timestamp_status(void *desc, u32 ats)
static int ndesc_get_rx_timestamp_status(void *desc, void *next_desc, u32 ats)
{
struct dma_desc *p = (struct dma_desc *)desc;

2
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

@@ -489,7 +489,7 @@ static void stmmac_get_rx_hwtstamp(struct stmmac_priv *priv, struct dma_desc *p,
desc = np;
/* Check if timestamp is available */
if (priv->hw->desc->get_rx_timestamp_status(desc, priv->adv_ts)) {
if (priv->hw->desc->get_rx_timestamp_status(p, np, priv->adv_ts)) {
ns = priv->hw->desc->get_timestamp(desc, priv->adv_ts);
netdev_dbg(priv->dev, "get valid RX hw timestamp %llu\n", ns);
shhwtstamp = skb_hwtstamps(skb);