i2c: mux: pca954x: Return error if irq_create_mapping fails

irq_create_mapping can return an error, report error to log and return.
Cleanup will occur in the probe function when an error is returned.

Suggested-by: Peter Rosin <peda@axentia.se>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c b/drivers/i2c/muxes/i2c-mux-pca954x.c
index 14aee65..2ca068d 100644 (file)
--- a/drivers/i2c/muxes/i2c-mux-pca954x.c
+++ b/drivers/i2c/muxes/i2c-mux-pca954x.c
@@ -277,6 +277,10 @@ static int pca954x_irq_setup(struct i2c_mux_core *muxc)
 
        for (c = 0; c < data->chip->nchans; c++) {
                irq = irq_create_mapping(data->irq, c);
+               if (!irq) {
+                       dev_err(&client->dev, "failed irq create map\n");
+                       return -EINVAL;
+               }
                irq_set_chip_data(irq, data);
                irq_set_chip_and_handler(irq, &pca954x_irq_chip,
                        handle_simple_irq);