6.6-stable review patch. If anyone has any objections, please let me know.
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From: Christoph Hellwig hch@lst.de
[ Upstream commit ddb4873286e03e193c5a3bebb5fc6fa820e9ee3a ]
At least zonefs expects error completions to be able to sleep. Because error completions aren't performance critical, just defer them to workqueue context unconditionally.
Fixes: 8dcc1a9d90c1 ("fs: New zonefs file system") Signed-off-by: Christoph Hellwig hch@lst.de Link: https://patch.msgid.link/20251113170633.1453259-3-hch@lst.de Reviewed-by: Jan Kara jack@suse.cz Reviewed-by: Chaitanya Kulkarni kch@nvidia.com Signed-off-by: Christian Brauner brauner@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/iomap/direct-io.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c index 1b0f06e7e58de..8158ab18e1ae8 100644 --- a/fs/iomap/direct-io.c +++ b/fs/iomap/direct-io.c @@ -172,7 +172,18 @@ static void iomap_dio_done(struct iomap_dio *dio)
WRITE_ONCE(dio->submit.waiter, NULL); blk_wake_io_task(waiter); - } else if (dio->flags & IOMAP_DIO_INLINE_COMP) { + return; + } + + /* + * Always run error completions in user context. These are not + * performance critical and some code relies on taking sleeping locks + * for error handling. + */ + if (dio->error) + dio->flags &= ~IOMAP_DIO_INLINE_COMP; + + if (dio->flags & IOMAP_DIO_INLINE_COMP) { WRITE_ONCE(iocb->private, NULL); iomap_dio_complete_work(&dio->aio.work); } else if (dio->flags & IOMAP_DIO_CALLER_COMP) {