From: yangerkun <yangerkun@xxxxxxxxxx>
We make a mistake while backport 'commit 84855678add8 ("spi: Fix
controller unregister order")'. What we should do is call __unreigster
for each device before spi_destroy_queue. This problem exist in
linux-4.4.y/linux-4.9.y.
Signed-off-by: yangerkun <yangerkun@xxxxxxxxxx>
---
drivers/spi/spi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1917,13 +1917,13 @@ static int __unregister(struct device *d
*/
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);
