gpio: eic-sprd: break loop when getting NULL device resource

[ Upstream commit 263ade7166a2e589c5b605272690c155c0637dcb ]

EIC controller have unfixed numbers of banks on different Spreadtrum SoCs,
and each bank has its own base address, the loop of getting there base
address in driver should break if the resource gotten via
platform_get_resource() is NULL already. The later ones would be all NULL
even if the loop continues.

Fixes: 25518e024e3a ("gpio: Add Spreadtrum EIC driver support")
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Link: https://lore.kernel.org/r/20201209055106.840100-1-zhang.lyra@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
index 4935cda5301ea8e7ff414807a3675b10a1337062..4f1af323ec03b0a352688b9a186fe464f6cca3e5 100644 (file)
--- a/drivers/gpio/gpio-eic-sprd.c
+++ b/drivers/gpio/gpio-eic-sprd.c
@@ -599,7 +599,7 @@ static int sprd_eic_probe(struct platform_device *pdev)
                 */
                res = platform_get_resource(pdev, IORESOURCE_MEM, i);
                if (!res)
-                       continue;
+                       break;
 
                sprd_eic->base[i] = devm_ioremap_resource(&pdev->dev, res);
                if (IS_ERR(sprd_eic->base[i]))