Now you've done it, Oliver :-) This is only the first series of what
to expect. And it will be getting worse as I dig myself closer and
closer to something I can use instead of my own banal attemt on
implementing the same functionality as this driver.
All these patches have been briefly tested against an Ericsson F3507g
modem with two proper AT command speaking WDM interfaces.
The first patch should be a pretty obvious race, although I don't know
how to trigger it intentionally.
The second patch improves the useability of this driver from 0% to
near 100% for me by allowing simultaneous read/write.
The third patch fixes a minor glitch I observe if I leave a process
reading from the device when it's removed. With this patch, the
read is unblocked on device removal, allowing the removal process
to finish. This is a common case for me, as my laptop will disconnect
the Ericsson modem using rfkill on suspend.
Bjørn Mork (3):
USB: cdc-wdm: updating desc->length must be protected by spin_lock
USB: cdc-wdm: use two mutexes to allow simultaneous read and write
USB: cdc-wdm: timeout blocking reads to allow driver to shutdown on
device removal
drivers/usb/class/cdc-wdm.c | 70 +++++++++++++++++++++++++++----------------
1 files changed, 44 insertions(+), 26 deletions(-)
--
1.7.8.3
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