Re: [PATCH] MUSB: Workaround for simultaneous TX and RX usage

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On Mon, Aug 04, 2008 at 06:48:22PM +0530, ext Gadiyar, Anand wrote:
> MUSB RTL v1.4 has a hardware issue which results in a DMA controller
> hang when TX and RX DMA channels are simultaneously enabled. This
> affects at least OMAP2430 and OMAP34XX.
> 
> Since RX transfers are in Mode 0 and anyway result in one DMA interrupt
> per packet, we can use System DMA to unload the RX fifos. MUSB DMA can
> be used for all TX channels as before.
> 
> Tested with full-duplex TX and RX transfers using g_ether. Runs for 24
> hours without a hang. Without this patch, the hang occurs within minutes.

This patch is not applying against linux-omap musb neither musb on
greg's queue. Could you please refresh it ? It's better to use the
version on greg's queue, if it fails for linux-omap I can prepare a
clean patch to avoid conflicts later.

-- 
balbi
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