Input: snvs_pwrkey - initialize necessary driver data before enabling IRQ

commit bf2a7ca39fd3ab47ef71c621a7ee69d1813b1f97 upstream.

SNVS IRQ is requested before necessary driver data initialized,
if there is a pending IRQ during driver probe phase, kernel
NULL pointer panic will occur in IRQ handler. To avoid such
scenario, just initialize necessary driver data before enabling
IRQ. This patch is inspired by NXP's internal kernel tree.

Fixes: d3dc6e232215 ("input: keyboard: imx: add snvs power key driver")
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/input/keyboard/snvs_pwrkey.c b/drivers/input/keyboard/snvs_pwrkey.c
index 9adf13a5864adaa94052b3a01d408658e4150123..57143365e9452cd83d37af8b17a71e1f96deb293 100644 (file)
--- a/drivers/input/keyboard/snvs_pwrkey.c
+++ b/drivers/input/keyboard/snvs_pwrkey.c
@@ -156,6 +156,9 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
                return error;
        }
 
+       pdata->input = input;
+       platform_set_drvdata(pdev, pdata);
+
        error = devm_request_irq(&pdev->dev, pdata->irq,
                               imx_snvs_pwrkey_interrupt,
                               0, pdev->name, pdev);
@@ -172,9 +175,6 @@ static int imx_snvs_pwrkey_probe(struct platform_device *pdev)
                return error;
        }
 
-       pdata->input = input;
-       platform_set_drvdata(pdev, pdata);
-
        device_init_wakeup(&pdev->dev, pdata->wakeup);
 
        return 0;