From: William Breathitt Gray <william.gray@linaro.org>
Date: Thu, 10 Aug 2023 22:00:44 +0000 (-0400)
Subject: gpio: ws16c48: Fix off-by-one error in WS16C48 resource region extent
X-Git-Tag: v6.6.7~2195^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=33f83d13ded164cd49ce2a3bd2770115abc64e6f;p=platform%2Fkernel%2Flinux-starfive.git

gpio: ws16c48: Fix off-by-one error in WS16C48 resource region extent

The WinSystems WS16C48 I/O address region spans offsets 0x0 through 0xA,
which is a total of 11 bytes. Fix the WS16C48_EXTENT define to the
correct value of 11 so that access to necessary device registers is
properly requested in the ws16c48_probe() callback by the
devm_request_region() function call.

Fixes: 2c05a0f29f41 ("gpio: ws16c48: Implement and utilize register structures")
Cc: stable@vger.kernel.org
Cc: Paul Demetrotion <pdemetrotion@winsystems.com>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---

diff --git a/drivers/gpio/gpio-ws16c48.c b/drivers/gpio/gpio-ws16c48.c
index e73885a..afb42a8 100644
--- a/drivers/gpio/gpio-ws16c48.c
+++ b/drivers/gpio/gpio-ws16c48.c
@@ -18,7 +18,7 @@
 #include <linux/spinlock.h>
 #include <linux/types.h>
 
-#define WS16C48_EXTENT 10
+#define WS16C48_EXTENT 11
 #define MAX_NUM_WS16C48 max_num_isa_dev(WS16C48_EXTENT)
 
 static unsigned int base[MAX_NUM_WS16C48];