[PATCH 4/4] gpio: Remove VLA from stmpe driver

[Laura Abbott]

The new challenge is to remove VLAs from the kernel
(see https://lkml.org/lkml/2018/3/7/621)

This patch replaces a VLA with an appropriate call to kmalloc_array.

Signed-off-by: Laura Abbott <labb...@redhat.com>
---
 drivers/gpio/gpio-stmpe.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index f8d7d1cd8488..b7854850bcdb 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -369,10 +369,14 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev)
        struct stmpe *stmpe = stmpe_gpio->stmpe;
        u8 statmsbreg;
        int num_banks = DIV_ROUND_UP(stmpe->num_gpios, 8);
-       u8 status[num_banks];
+       u8 *status;
        int ret;
        int i;
 
+       status = kmalloc_array(num_banks, sizeof(*status), GFP_ATOMIC);
+       if (!status)
+               return IRQ_NONE;
+
        /*
         * the stmpe_block_read() call below, imposes to set statmsbreg
         * with the register located at the lowest address. As STMPE1600
@@ -424,6 +428,7 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev)
                }
        }
 
+       kfree(status);
        return IRQ_HANDLED;
 }
 
-- 
2.14.3