[PATCH] Input: synaptics-rmi4 - Fix error handling in SPI transport driver

[Guenter Roeck]

Instantiating the rmi4 SPI transport driver without an interrupt assigned
caused the driver to fail to load, but it does not clean up its transport
device registration. Result may be a crash at a later time, for example
when rebooting the system.

Fixes: 8d99758dee31 ("Input: synaptics-rmi4 - add SPI transport driver")
Cc: Andrew Duggan <adug...@synaptics.com>
Signed-off-by: Guenter Roeck <li...@roeck-us.net>
---
 drivers/input/rmi4/rmi_spi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/input/rmi4/rmi_spi.c b/drivers/input/rmi4/rmi_spi.c
index 55bd1b34970c..f8484b7cdead 100644
--- a/drivers/input/rmi4/rmi_spi.c
+++ b/drivers/input/rmi4/rmi_spi.c
@@ -466,8 +466,10 @@ static int rmi_spi_probe(struct spi_device *spi)
        }
 
        retval = rmi_spi_init_irq(spi);
-       if (retval < 0)
+       if (retval < 0) {
+               rmi_unregister_transport_device(&rmi_spi->xport);
                return retval;
+       }
 
        dev_info(&spi->dev, "registered RMI SPI driver\n");
        return 0;
-- 
2.5.0