On Fri, Feb 14, 2020 at 02:46:51PM -0500, Daniel Jordan wrote:
From: Herbert Xu herbert@gondor.apana.org.au
[ Upstream commit 07928d9bfc81640bab36f5190e8725894d93b659 ]
The function padata_flush_queues is fundamentally broken because it cannot force padata users to complete the request that is underway. IOW padata has to passively wait for the completion of any outstanding work.
As it stands flushing is used in two places. Its use in padata_stop is simply unnecessary because nothing depends on the queues to be flushed afterwards.
The other use in padata_replace is more substantial as we depend on it to free the old pd structure. This patch instead uses the pd->refcnt to dynamically free the pd structure once all requests are complete.
Fixes: 2b73b07ab8a4 ("padata: Flush the padata queues actively") Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Reviewed-by: Daniel Jordan daniel.m.jordan@oracle.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au [dj: leave "pd->pinst = pinst" assignment in padata_alloc_pd()] Signed-off-by: Daniel Jordan daniel.m.jordan@oracle.com
Thanks, all 3 backports now queued up.
greg k-h