Thread (2 messages) 2 messages, 2 authors, 2006-01-18

RE: Query regarding behavior of PCMCIA devices with respect to suspend and resume

From: Alan Stern <stern@rowland.harvard.edu>
Date: 2006-01-18 15:20:52

On Wed, 18 Jan 2006 kaustav.majumdar@wipro.com wrote:
Hi
What I want to say is that if we will be doing a large file transfer
using the USB port of the PCMCIA device, then after suspend when we will
resume whether the file transfer will be resumed or it will be starting
all over again?
Let us suppose that the controller for the USB port has the capability
to resume the transfer. But the PCMCIA client driver will release the
configuration on suspension and get a new configuration on resumption
(as in a number of PCMCIA client driver). As the controller of the USB
port will be using the resources allocated by the PCMCIA client driver
and as per my understanding, during the new configuration the resources
can be allocated anywhere in the io space (no guarantee of getting
mapped in the same region of io space where it was before suspension), I
think it will be troublesome to handle suspend/resume in the controller
for the USB port if we will do nothing extra inside PCMCIA client
driver.
This question should be posted on linux-usb-devel, since it's really 
asking about the behavior of USB host controller drivers.

Right now, the only USB host controller with a PCMCIA driver is sl811,
so you should also CC: the author of the sl811_cs.c file.

Alan Stern

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