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Date: Mon, 9 Apr 2018 14:07:17 -0700
From: Laura Abbott <labbott@...hat.com>
To: Nandor Han <nandor.han@...com>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Kees Cook <keescook@...omium.org>,
Linus Walleij <linus.walleij@...aro.org>
Cc: Laura Abbott <labbott@...hat.com>,
linux-gpio@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
kernel-hardening@...ts.openwall.com
Subject: [PATCH] gpio: xra1403: Switch to a fixed upper bound for registers
Geert Uytterhoeven pointed out that the number of register was a
fixed upper bound so there's no need to use a dynamically allocated
array in place of a VLA. Use the defined upper bound.
Suggested-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Signed-off-by: Laura Abbott <labbott@...hat.com>
---
drivers/gpio/gpio-xra1403.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)
diff --git a/drivers/gpio/gpio-xra1403.c b/drivers/gpio/gpio-xra1403.c
index 8d4c8e99b251..8711a7907568 100644
--- a/drivers/gpio/gpio-xra1403.c
+++ b/drivers/gpio/gpio-xra1403.c
@@ -39,6 +39,7 @@
#define XRA_REIR 0x10 /* Input Rising Edge Interrupt Enable */
#define XRA_FEIR 0x12 /* Input Falling Edge Interrupt Enable */
#define XRA_IFR 0x14 /* Input Filter Enable/Disable */
+#define XRA_LAST 0x15 /* Bounds */
struct xra1403 {
struct gpio_chip chip;
@@ -50,7 +51,7 @@ static const struct regmap_config xra1403_regmap_cfg = {
.pad_bits = 1,
.val_bits = 8,
- .max_register = XRA_IFR | 0x01,
+ .max_register = XRA_LAST,
};
static unsigned int to_reg(unsigned int reg, unsigned int offset)
@@ -126,21 +127,16 @@ static void xra1403_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
int reg;
struct xra1403 *xra = gpiochip_get_data(chip);
- int *value;
+ int value[XRA_LAST];
int i;
unsigned int gcr;
unsigned int gsr;
- value = kmalloc_array(xra1403_regmap_cfg.max_register, sizeof(*value),
- GFP_KERNEL);
- if (!value)
- return;
-
seq_puts(s, "xra reg:");
- for (reg = 0; reg <= xra1403_regmap_cfg.max_register; reg++)
+ for (reg = 0; reg <= XRA_LAST; reg++)
seq_printf(s, " %2.2x", reg);
seq_puts(s, "\n value:");
- for (reg = 0; reg < xra1403_regmap_cfg.max_register; reg++) {
+ for (reg = 0; reg < XRA_LAST; reg++) {
regmap_read(xra->regmap, reg, &value[reg]);
seq_printf(s, " %2.2x", value[reg]);
}
@@ -159,7 +155,6 @@ static void xra1403_dbg_show(struct seq_file *s, struct gpio_chip *chip)
(gcr & BIT(i)) ? "in" : "out",
(gsr & BIT(i)) ? "hi" : "lo");
}
- kfree(value);
}
#else
#define xra1403_dbg_show NULL
--
2.14.3
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