watchdog: rzg2l_wdt: Add error check for reset_control_deassert

If reset_control_deassert() fails, then we won't be able to
access the device registers. Therefore check the return code of
reset_control_deassert() and bailout in case of error.

Signed-off-by: Biju Das <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>

Author: bijudas

drivers/watchdog/rzg2l_wdt.c

@@ -203,7 +203,10 @@ static int rzg2l_wdt_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, PTR_ERR(priv->rstc),
 				     "failed to get cpg reset");
 
-	reset_control_deassert(priv->rstc);
+	ret = reset_control_deassert(priv->rstc);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to deassert");
+
 	pm_runtime_enable(&pdev->dev);
 
 	priv->wdev.info = &rzg2l_wdt_ident;