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Alan Stern wrote: | Even though you've already updated the driver, you might like to get some | answers to your questions. | | On Tue, 18 Jan 2005, Thomas Winischhofer wrote: | | |>Is -ECONNRESET only set if the URB is (forcefully) unlinked (by me)? | | | The status will be set to -ECONNRESET whenever the URB is terminated by | someone (it doesn't have to be you) calling usb_unlink_urb, provided the | URB_ASYNC_UNLINK flag is set. (That last requirement, along with the | URB_ASYNC_UNLINK flag itself, will be phased out of the kernel before | long.) Other methods of termination will result in a different status | value. | | |>Will the completion handler be called under ALL circumstances? In this |>case I could avoid the (own) timeout loop and just wait (forever) for |>the completion handler to clear the BUSY bit. Would that be correct? | | | The completion handler will be called when the URB completes, no matter | what, guaranteed. Yes, you can just wait for the handler to clear the | BUSY bit. Do remember that the handler won't run until the URB completes, | which might not be for a very long time... If you don't implement a | timeout, the typical sorts of things that might cause an otherwise hung-up | URB to complete are: your driver is unloaded, the device is unplugged, the | host controller driver is unloaded. (Shutting down the system does not in | itself cause URBs to complete.)
Thanks, Alan. Do you consider the current (1.0.2) patch ok in the above mentioned regards?
Thomas
- -- Thomas Winischhofer Vienna/Austria thomas AT winischhofer DOT net *** http://www.winischhofer.net twini AT xfree86 DOT org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux)
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