char: xilinx_hwicap: Fix NULL vs IS_ERR() bug

The devm_platform_ioremap_resource() function returns error pointers.
It never returns NULL.  Update the check accordingly.

Fixes: 6723718 ("char: xilinx_hwicap: Modernize driver probe")
Signed-off-by: Dan Carpenter <[email protected]>
Acked-by: Michal Simek <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Dan Carpenter

drivers/char/xilinx_hwicap/xilinx_hwicap.c

@@ -639,8 +639,8 @@ static int hwicap_setup(struct platform_device *pdev, int id,
 	dev_set_drvdata(dev, drvdata);
 
 	drvdata->base_address = devm_platform_ioremap_resource(pdev, 0);
-	if (!drvdata->base_address) {
-		retval = -ENODEV;
+	if (IS_ERR(drvdata->base_address)) {
+		retval = PTR_ERR(drvdata->base_address);
 		goto failed;
 	}