No. After that it fails on 2.6.28, I wrote a new API inside my driver which is 
similar to your 2.6.28 spi_write_then_read(), but modify the buffer layout. And 
the new API works fine for my max3111 device. 

Thanks,
Feng
-----Original Message-----
From: David Brownell [mailto:[email protected]] 
Sent: 2008年12月24日 11:53
To: Tang, Feng
Cc: Linus Torvalds; [email protected]; Andrew Morton; 
Vernon Sauder
Subject: Re: [spi-devel-general] [patch 2.6.28-rc9] spi: spi_write_then_read() 
regression fix

On Tuesday 23 December 2008, Tang, Feng wrote:
> I'm writing a SPI-UART device driver for max3111, its working
> mechanism is if you want read data back, you need write 0 to
> it first ...
> 
> The driver works in 2.6.27 with your previous spi_write_then_read()
> implementation, but fails on 2.6.28 as it dumps all the readback
> value of the write.  

And so it works with the $SUBJECT patch, yes?
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