Hi all, I have the following queries regarding the power management on a PCMCIA based USB host controller driver.
1. The SUSPEND event in the PCMCIA client driver is handled in the following way: In the PCMCIA layer, on a SUSPEND event, the socket layer powers off the card. As the USB framework behavior is not allowed to suspend if lower nodes are not already suspended, we assume that the correct behavior for the above case should be to shut down the Host Controller. I want to confirm whether the assumed behavior is ok or should the behavior be something else? 2. And if the correct behavior is what we had assumed, then to implement that we call usb_remove_hcd from the PCMCIA client driver. Is this the correct way to do so? The reason for the question is it can happen that after suspending the card, before resume card may be manually removed. In that case, there is a possibility of usb_remove_hcd being called twice consecutively which can cause error. Please suggest if any better way of implementing the above. Looking forward to you replies and thanks in advance Thank you, With Regards, Kaustav Majumdar ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid0944&bid$1720&dat1642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
