From: Sergei Shtylyov <sshtylyov-Igf4POYTYCDQT0dZR+AlfA@public•gmane.org>
To: Ming Lei <ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public•gmane.org>
Cc: "David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public•gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public•gmane.org>,
Oliver Neukum <oneukum-l3A5Bk7waGM@public•gmane.org>,
netdev-u79uwXL29TY76Z2rM5mHXA@public•gmane.org,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public•gmane.org
Subject: Re: [PATCH -v1 3/3] usbnet: handle remote wakeup asap
Date: Wed, 20 Jun 2012 15:02:12 +0400 [thread overview]
Message-ID: <4FE1ADB4.4060302@mvista.com> (raw)
In-Reply-To: <1340176553-32225-4-git-send-email-ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
Hello.
On 20-06-2012 11:15, Ming Lei wrote:
> If usbnet is resumed by remote wakeup, generally there are
> some packets comming to be handled, so allocate and submit
> rx URBs in usbnet_resume to avoid delays introduced by tasklet.
> Otherwise, usbnet may have been runtime suspended before the
> usbnet_bh is executed to schedule Rx URBs.
> Without the patch, usbnet can't recieve any packets from peer
> in runtime suspend state if runtime PM is enabled and
> autosuspend_delay is set as zero.
> Signed-off-by: Ming Lei<ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public•gmane.org>
> ---
> drivers/net/usb/usbnet.c | 42 ++++++++++++++++++++++++++----------------
> 1 file changed, 26 insertions(+), 16 deletions(-)
> diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
> index 9bfa775..a89d6c5 100644
> --- a/drivers/net/usb/usbnet.c
> +++ b/drivers/net/usb/usbnet.c
> @@ -1201,6 +1201,21 @@ deferred:
> }
> EXPORT_SYMBOL_GPL(usbnet_start_xmit);
>
> +static void rx_alloc_submit(struct usbnet *dev, gfp_t flags)
> +{
> + struct urb *urb;
> + int i;
> +
> + /* don't refill the queue all at once */
> + for (i = 0; i< 10&& dev->rxq.qlen< RX_QLEN(dev); i++) {
> + urb = usb_alloc_urb(0, flags);
> + if (urb != NULL) {
> + if (rx_submit(dev, urb, flags) == -ENOLINK)
The above 2 *if* statements can be collapsed into single one.
> + return;
> + }
> + }
> +}
> +
WBR, Sergei
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next prev parent reply other threads:[~2012-06-20 11:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-20 7:15 [PATCH -v1 0/3] usbnet: usbnet: PM related fixes Ming Lei
2012-06-20 7:15 ` [PATCH -v1 1/3] usbnet: clear OPEN flag in failure path Ming Lei
2012-06-20 7:44 ` Oliver Neukum
[not found] ` <1340176553-32225-1-git-send-email-ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
2012-06-20 7:15 ` [PATCH -v1 2/3] usbnet: decrease suspend count if returning -EBUSY for runtime suspend Ming Lei
[not found] ` <1340176553-32225-3-git-send-email-ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
2012-06-20 7:45 ` Oliver Neukum
2012-06-20 7:15 ` [PATCH -v1 3/3] usbnet: handle remote wakeup asap Ming Lei
2012-06-20 7:46 ` Oliver Neukum
[not found] ` <1340176553-32225-4-git-send-email-ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
2012-06-20 11:02 ` Sergei Shtylyov [this message]
[not found] ` <4FE1ADB4.4060302-Igf4POYTYCDQT0dZR+AlfA@public.gmane.org>
2012-06-20 11:24 ` Oliver Neukum
2012-06-23 0:34 ` [PATCH -v1 0/3] usbnet: usbnet: PM related fixes David Miller
2012-06-20 7:46 ` Oliver Neukum
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