linux-kernel - [PATCH 5.12 045/173] spi: Dont have controller clean up spi device before driver unbind

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Message-Id: <20210614102659.660270934@linuxfoundation.org>
Date:   Mon, 14 Jun 2021 12:26:17 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Lukas Wunner <lukas@...ner.de>,
        Saravana Kannan <saravanak@...gle.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 045/173] spi: Dont have controller clean up spi device before driver unbind

From: Saravana Kannan <saravanak@...gle.com>

[ Upstream commit 27e7db56cf3dffd302bd7ddfacb1d405cf671a2a ]

When a spi device is unregistered and triggers a driver unbind, the
driver might need to access the spi device. So, don't have the
controller clean up the spi device before the driver is unbound. Clean
up the spi device after the driver is unbound.

Fixes: c7299fea6769 ("spi: Fix spi device unregister flow")
Reported-by: Lukas Wunner <lukas@...ner.de>
Signed-off-by: Saravana Kannan <saravanak@...gle.com>
Tested-by: Andy Shevchenko <andy.shevchenko@...il.com>
Link: https://lore.kernel.org/r/20210505164734.175546-1-saravanak@google.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/spi/spi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 125116ab3386..e067c54e87dd 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -717,15 +717,15 @@ void spi_unregister_device(struct spi_device *spi)
 	if (!spi)
 		return;
 
-	spi_cleanup(spi);
-
 	if (spi->dev.of_node) {
 		of_node_clear_flag(spi->dev.of_node, OF_POPULATED);
 		of_node_put(spi->dev.of_node);
 	}
 	if (ACPI_COMPANION(&spi->dev))
 		acpi_device_clear_enumerated(ACPI_COMPANION(&spi->dev));
-	device_unregister(&spi->dev);
+	device_del(&spi->dev);
+	spi_cleanup(spi);
+	put_device(&spi->dev);
 }
 EXPORT_SYMBOL_GPL(spi_unregister_device);
 
-- 
2.30.2