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can: peak_usb: fix hwtstamp assignment

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The skb->tstamp is set to the hardware timestamp when available in the USB
urb message. This leads to user visible timestamps which contain the 'uptime'
of the USB adapter - and not the usual system generated timestamp.

Fix this wrong assignment by applying the available hardware timestamp to the
skb_shared_hwtstamps data structure - which is intended for this purpose.

Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Oliver Hartkopp 2012-11-21 22:43:59 +01:00 committed by Marc Kleine-Budde
parent 194d9831f0
commit c9faaa09e2
2 changed files with 12 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/can/usb/peak_usb/pcan_usb.c
View File

@ -519,8 +519,10 @@ static int pcan_usb_decode_error(struct pcan_usb_msg_context *mc, u8 n,
mc->pdev->dev.can.state = new_state;
if (status_len & PCAN_USB_STATUSLEN_TIMESTAMP) {
struct skb_shared_hwtstamps *hwts = skb_hwtstamps(skb);
peak_usb_get_ts_tv(&mc->pdev->time_ref, mc->ts16, &tv);
skb->tstamp = timeval_to_ktime(tv);
hwts->hwtstamp = timeval_to_ktime(tv);
}
netif_rx(skb);
@ -605,6 +607,7 @@ static int pcan_usb_decode_data(struct pcan_usb_msg_context *mc, u8 status_len)
struct sk_buff *skb;
struct can_frame *cf;
struct timeval tv;
struct skb_shared_hwtstamps *hwts;
skb = alloc_can_skb(mc->netdev, &cf);
if (!skb)
@ -652,7 +655,8 @@ static int pcan_usb_decode_data(struct pcan_usb_msg_context *mc, u8 status_len)
/* convert timestamp into kernel time */
peak_usb_get_ts_tv(&mc->pdev->time_ref, mc->ts16, &tv);
skb->tstamp = timeval_to_ktime(tv);
hwts = skb_hwtstamps(skb);
hwts->hwtstamp = timeval_to_ktime(tv);
/* push the skb */
netif_rx(skb);

8
drivers/net/can/usb/peak_usb/pcan_usb_pro.c
View File

@ -532,6 +532,7 @@ static int pcan_usb_pro_handle_canmsg(struct pcan_usb_pro_interface *usb_if,
struct can_frame *can_frame;
struct sk_buff *skb;
struct timeval tv;
struct skb_shared_hwtstamps *hwts;
skb = alloc_can_skb(netdev, &can_frame);
if (!skb)
@ -549,7 +550,8 @@ static int pcan_usb_pro_handle_canmsg(struct pcan_usb_pro_interface *usb_if,
memcpy(can_frame->data, rx->data, can_frame->can_dlc);
peak_usb_get_ts_tv(&usb_if->time_ref, le32_to_cpu(rx->ts32), &tv);
skb->tstamp = timeval_to_ktime(tv);
hwts = skb_hwtstamps(skb);
hwts->hwtstamp = timeval_to_ktime(tv);
netif_rx(skb);
netdev->stats.rx_packets++;
@ -570,6 +572,7 @@ static int pcan_usb_pro_handle_error(struct pcan_usb_pro_interface *usb_if,
u8 err_mask = 0;
struct sk_buff *skb;
struct timeval tv;
struct skb_shared_hwtstamps *hwts;
/* nothing should be sent while in BUS_OFF state */
if (dev->can.state == CAN_STATE_BUS_OFF)
@ -664,7 +667,8 @@ static int pcan_usb_pro_handle_error(struct pcan_usb_pro_interface *usb_if,
dev->can.state = new_state;
peak_usb_get_ts_tv(&usb_if->time_ref, le32_to_cpu(er->ts32), &tv);
skb->tstamp = timeval_to_ktime(tv);
hwts = skb_hwtstamps(skb);
hwts->hwtstamp = timeval_to_ktime(tv);
netif_rx(skb);
netdev->stats.rx_packets++;
netdev->stats.rx_bytes += can_frame->can_dlc;