Revert "i2c: core: Dispose OF IRQ mapping at client removal time"

[ Upstream commit a49445727014216703a3c28ccee4cef36d41571e ]

This reverts commit e4df3a0b6228
("i2c: core: Dispose OF IRQ mapping at client removal time")

Calling irq_dispose_mapping() will destroy the mapping and disassociate
the IRQ from the IRQ chip to which it belongs. Keeping it is OK, because
existent mappings are reused properly.

Also, this commit breaks drivers using devm* for IRQ management on
OF-based systems because devm* cleanup happens in device code, after
bus's remove() method returns.

Signed-off-by: Jakub Kicinski <kubakici@wp.pl>
Reported-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
[wsa: updated the commit message with findings fromt the other bug report]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
Fixes: e4df3a0b6228
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index f43b4e11647a28338235b1fcba1070ab2a34f91b..17a1853c6c2f313f02d9a4114027171b2eb09db7 100644 (file)
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -665,9 +665,6 @@ static int i2c_device_remove(struct device *dev)
                status = driver->remove(client);
        }
 
-       if (dev->of_node)
-               irq_dispose_mapping(client->irq);
-
        dev_pm_domain_detach(&client->dev, true);
        return status;
 }