USB: usb_wwan: fix potential blocked I/O after resume

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commit fb7ad4f93d upstream.

Keep trying to submit urbs rather than bail out on first read-urb
submission error, which would also prevent I/O for any further ports
from being resumed.

Instead keep an error count, for all types of failed submissions, and
let USB core know that something went wrong.

Also make sure to always clear the suspended flag. Currently a failed
read-urb submission would prevent cached writes as well as any
subsequent writes from being submitted until next suspend-resume cycle,
something which may not even necessarily happen.

Note that USB core currently only logs an error if an interface resume
failed.

Fixes: 383cedc3bb ("USB: serial: full autosuspend support for the
option driver")

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Johan Hovold 2014-05-26 19:23:18 +02:00 • committed by Greg Kroah-Hartman

parent b284256354

commit 8aa440e39e

1 changed files with 17 additions and 8 deletions

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drivers/usb/serial/usb_wwan.c

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