On Wed, Nov 06, 2024 at 07:42:45AM -0800, mhkelley58@xxxxxxxxx wrote: > From: Michael Kelley <mhklinux@xxxxxxxxxxx> > > Patch 1 fixes util_probe() to not force the error return value to > ENODEV when the util_init function fails -- just return the error > code from util_init so the real error code is displayed in messages. > > Patch 2 fixes a more serious race condition between initialization > of the VMBus channel and initial operations of the user space > daemons for KVP and VSS. The fix reorders the initialization in > util_probe() so the race condition can't happen. > > The two fixes are functionally independent, but Patch 2 introduces > the util_init_transport function that parallels the existing code > for the util_init function. Doing Patch 1 first avoids an > inconsistency in the error handling in similar code for these two > parts of util_probe(). > > This series is v2 of a single patch first posted by Dexuan Cui > to fix the race condition.[1] I've taken over the patch per > discussion with Dexuan. > > [1] https://lore.kernel.org/linux-hyperv/20240909164719.41000-1-decui@xxxxxxxxxxxxx/ > > Michael Kelley (2): > Drivers: hv: util: Don't force error code to ENODEV in util_probe() > Drivers: hv: util: Avoid accessing a ringbuffer not initialized yet Acked-by: Wei Liu <wei.liu@xxxxxxxxxx>
