From: Richard Cochran <richardcochran@gmail.com>
To: Antoine Tenart <antoine.tenart@bootlin.com>
Cc: davem@davemloft.net, andrew@lunn.ch, f.fainelli@gmail.com,
hkallweit1@gmail.com, alexandre.belloni@bootlin.com,
UNGLinuxDriver@microchip.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com,
allan.nielsen@microchip.com, foss@0leil.net
Subject: Re: [PATCH net-next v3 6/8] net: phy: mscc: timestamping and PHC support
Date: Sat, 20 Jun 2020 08:00:45 -0700 [thread overview]
Message-ID: <20200620150045.GA2054@localhost> (raw)
In-Reply-To: <20200619122300.2510533-7-antoine.tenart@bootlin.com>
On Fri, Jun 19, 2020 at 02:22:58PM +0200, Antoine Tenart wrote:
> +static void vsc85xx_dequeue_skb(struct vsc85xx_ptp *ptp)
> +{
> + struct skb_shared_hwtstamps shhwtstamps;
> + struct vsc85xx_ts_fifo fifo;
> + struct sk_buff *skb;
> + u8 skb_sig[16], *p;
> + int i, len;
> + u32 reg;
> +
> + memset(&fifo, 0, sizeof(fifo));
> + p = (u8 *)&fifo;
> +
> + reg = vsc85xx_ts_read_csr(ptp->phydev, PROCESSOR,
> + MSCC_PHY_PTP_EGR_TS_FIFO(0));
> + if (reg & PTP_EGR_TS_FIFO_EMPTY)
> + return;
> +
> + *p++ = reg & 0xff;
> + *p++ = (reg >> 8) & 0xff;
> +
> + /* Read the current FIFO item. Reading FIFO6 pops the next one. */
> + for (i = 1; i < 7; i++) {
> + reg = vsc85xx_ts_read_csr(ptp->phydev, PROCESSOR,
> + MSCC_PHY_PTP_EGR_TS_FIFO(i));
> + *p++ = reg & 0xff;
> + *p++ = (reg >> 8) & 0xff;
> + *p++ = (reg >> 16) & 0xff;
> + *p++ = (reg >> 24) & 0xff;
> + }
> +
> + len = skb_queue_len(&ptp->tx_queue);
> + if (len < 1)
> + return;
> +
> + while (len--) {
> + skb = __skb_dequeue(&ptp->tx_queue);
> + if (!skb)
> + return;
> +
> + /* Can't get the signature of the packet, won't ever
> + * be able to have one so let's dequeue the packet.
> + */
> + if (get_sig(skb, skb_sig) < 0)
> + continue;
This leaks the skb.
> + /* Check if we found the signature we were looking for. */
> + if (!memcmp(skb_sig, fifo.sig, sizeof(fifo.sig))) {
> + memset(&shhwtstamps, 0, sizeof(shhwtstamps));
> + shhwtstamps.hwtstamp = ktime_set(fifo.secs, fifo.ns);
> + skb_complete_tx_timestamp(skb, &shhwtstamps);
> +
> + return;
> + }
> +
> + /* Valid signature but does not match the one of the
> + * packet in the FIFO right now, reschedule it for later
> + * packets.
> + */
> + __skb_queue_tail(&ptp->tx_queue, skb);
> + }
> +}
Thanks,
Richard
next prev parent reply other threads:[~2020-06-20 15:00 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-19 12:22 [PATCH net-next v3 0/8] net: phy: mscc: PHC and timestamping support Antoine Tenart
2020-06-19 12:22 ` [PATCH net-next v3 1/8] net: phy: add support for a common probe between shared PHYs Antoine Tenart
2020-06-20 14:49 ` Andrew Lunn
2020-06-19 12:22 ` [PATCH net-next v3 2/8] net: phy: mscc: fix copyright and author information in MACsec Antoine Tenart
2020-06-20 14:50 ` Andrew Lunn
2020-06-19 12:22 ` [PATCH net-next v3 3/8] net: phy: mscc: remove the TR CLK disable magic value Antoine Tenart
2020-06-20 14:52 ` Andrew Lunn
2020-06-22 12:49 ` Antoine Tenart
2020-06-19 12:22 ` [PATCH net-next v3 4/8] net: phy: mscc: take into account the 1588 block in MACsec init Antoine Tenart
2020-06-21 15:38 ` Quentin Schulz
2020-06-22 14:25 ` Antoine Tenart
2020-06-19 12:22 ` [PATCH net-next v3 5/8] net: phy: mscc: 1588 block initialization Antoine Tenart
2020-06-20 15:10 ` Andrew Lunn
2020-06-22 13:07 ` Antoine Tenart
2020-06-21 16:57 ` Quentin Schulz
2020-06-22 15:26 ` Antoine Tenart
2020-06-19 12:22 ` [PATCH net-next v3 6/8] net: phy: mscc: timestamping and PHC support Antoine Tenart
2020-06-20 15:00 ` Richard Cochran [this message]
2020-06-22 13:09 ` Antoine Tenart
2020-06-20 15:16 ` Andrew Lunn
2020-06-20 15:21 ` Andrew Lunn
2020-06-22 13:31 ` Antoine Tenart
2020-06-20 15:40 ` Andrew Lunn
2020-06-22 13:26 ` Antoine Tenart
2020-06-21 17:35 ` Quentin Schulz
2020-06-22 15:35 ` Antoine Tenart
2020-06-19 12:22 ` [PATCH net-next v3 7/8] dt-bindings: net: phy: vsc8531: document the load/save GPIO Antoine Tenart
2020-06-19 12:23 ` [PATCH net-next v3 8/8] MIPS: dts: ocelot: describe " Antoine Tenart
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200620150045.GA2054@localhost \
--to=richardcochran@gmail.com \
--cc=UNGLinuxDriver@microchip.com \
--cc=alexandre.belloni@bootlin.com \
--cc=allan.nielsen@microchip.com \
--cc=andrew@lunn.ch \
--cc=antoine.tenart@bootlin.com \
--cc=davem@davemloft.net \
--cc=f.fainelli@gmail.com \
--cc=foss@0leil.net \
--cc=hkallweit1@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=thomas.petazzoni@bootlin.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).