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Date:	Wed, 12 Nov 2014 06:29:46 +0000
From:	Hayes Wang <>
To:	David Miller <>
CC:	"" <>,
	nic_swsd <>,
	"" <>,
	"" <>
Subject: RE: [PATCH net-next 2/2] r8152: adjust rtl_start_rx

David Miller [] 
> Sent: Wednesday, November 12, 2014 1:44 PM
> What do other USB network drivers do in similar situations?

According to the usbnet.c, it would make sure to submit the
number of min(10, RX_QLEN(dev)) rx buffers. If there are
not enough rx buffers, it schedule a tasklet for next try.

The brief flow is as following.
1. Call open().
   - schedule a tasklet.
2. Tasklet is called.
   if (dev->rxq.qlen < RX_QLEN(dev)) {
	   - submit rx buffers util the number of
	     min(10, RX_QLEN(dev)). If the error
	     occurs, break the loop.
	   - If the dev->rxq.qlen < RX_QLEN(dev),
	     schedule the tasklet.

Best Regards,
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