On 01/24/2012 08:55 AM, Felipe Balbi wrote:
On Tue, Jan 24, 2012 at 08:52:48AM +0100, Sebastian Andrzej Siewior wrote:
On 01/24/2012 04:03 AM, Alan Stern wrote:
On Mon, 23 Jan 2012, Paul Zimmerman wrote:
You don't need to wait for the hardware to complete the transfer. You
just need to be sure the completion callbacks are called with an
appropriate error code before usb_ep_disable() returns. You can arrange
for the DWC3 driver to handle the hardware completions later when/if
they happen.
But you do need to wait until the hardware has finished accessing the
data buffers.
Exactly. We have to wait until the hardware released the data buffer
it has been assigned.
After you issue ENDTRANSFER command, the fact that CMDACT gets cleared
means that HW has completed the command, no ?
Actually, no it does not. The spec says that you have to wait for the
event to occur for synchronization reasons.
Sebastian
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