On Sat, Oct 10, 2020 at 04:41:09PM +0800, yangerkun wrote:
> ?? 2020/6/16 9:56, Sasha Levin ????:
> > This is a note to let you know that I've just added the patch titled
> >
> > spi: Fix controller unregister order
> >
> > to the 4.4-stable tree which can be found at:
[...]
> > --- a/drivers/spi/spi.c
> > +++ b/drivers/spi/spi.c
> > @@ -1922,11 +1922,12 @@ void spi_unregister_master(struct spi_master *master)
> > dev_err(&master->dev, "queue remove failed\n");
> > }
> > + device_for_each_child(&master->dev, NULL, __unregister);
> > +
>
> This is a wrong patch. We should move this line before
> spi_destroy_queue, but we didn't. 4.9 stable exists this
> problem too.
Hi Sasha, Hi Greg,
below please find a patch for the 4.9-stable tree to fix the backporting
issue reported above.
Thanks!
-- >8 --
Subject: [PATCH] spi: Fix controller unregister order harder
Commit c7e41e1caa71 sought to backport upstream commit 84855678add8 to
the 4.9-stable tree but erroneously inserted a line at the wrong place.
Fix it.
Fixes: c7e41e1caa71 ("spi: Fix controller unregister order")
Reported-by: yangerkun <yangerkun@xxxxxxxxxx>
Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
---
drivers/spi/spi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index c7c9ca3178ad..e0632ee1723b 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2070,13 +2070,13 @@ static int __unregister(struct device *dev, void *null)
*/
void spi_unregister_master(struct spi_master *master)
{
+ device_for_each_child(&master->dev, NULL, __unregister);
+
if (master->queued) {
if (spi_destroy_queue(master))
dev_err(&master->dev, "queue remove failed\n");
}
- device_for_each_child(&master->dev, NULL, __unregister);
-
mutex_lock(&board_lock);
list_del(&master->list);
mutex_unlock(&board_lock);
--
2.29.2
