irqchip/mvebu-gicp: Use resource_size() for ioremap()

commit 9f7488f upstream.

0-day reported an off by one in the ioremap() sizing:

  drivers/irqchip/irq-mvebu-gicp.c:240:45-48: WARNING:
  Suspicious code. resource_size is maybe missing with gicp -> res

Convert it to resource_size(), which does the right thing.

Fixes: 3c3d7db ("irqchip/mvebu-gicp: Clear pending interrupts on init")
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: KAGA-KOKO

drivers/irqchip/irq-mvebu-gicp.c

@@ -237,7 +237,7 @@ static int mvebu_gicp_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	base = ioremap(gicp->res->start, gicp->res->end - gicp->res->start);
+	base = ioremap(gicp->res->start, resource_size(gicp->res));
 	if (IS_ERR(base)) {
 		dev_err(&pdev->dev, "ioremap() failed. Unable to clear pending interrupts.\n");
 	} else {