[PATCH] Staging: Pi433: Bugfix for wrong argument for sizeof() in TX thread

[Marcus Wolf]

sizeof(array) != sizeof(pointer to array)
Fixes: "staging: pi433: reduce stack size in tx thread"

Signed-off-by: Marcus Wolf <li...@wolf-entwicklungen.de>
---
 drivers/staging/pi433/pi433_if.c |   13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c
index 1f3ba55..6e6f595 100644
--- a/drivers/staging/pi433/pi433_if.c
+++ b/drivers/staging/pi433/pi433_if.c
@@ -565,7 +565,6 @@ static irqreturn_t DIO1_irq_handler(int irq, void *dev_id)
        struct pi433_device *device = data;
        struct spi_device *spi = device->spi;
        struct pi433_tx_cfg tx_cfg;
-       u8     *buffer = device->buffer;
        size_t size;
        bool   rx_interrupted = false;
        int    position, repetitions;
@@ -614,19 +613,19 @@ static irqreturn_t DIO1_irq_handler(int irq, void *dev_id)
                        size++;
 
                /* prime buffer */
-               memset(buffer, 0, size);
+               memset(device->buffer, 0, size);
                position = 0;
 
                /* add length byte, if requested */
                if (tx_cfg.enable_length_byte  == OPTION_ON)
-                       buffer[position++] = size - 1; /* according to spec 
length byte itself must be excluded from the length calculation */
+                       device->buffer[position++] = size - 1; /* according to 
spec length byte itself must be excluded from the length calculation */
 
                /* add adr byte, if requested */
                if (tx_cfg.enable_address_byte == OPTION_ON)
-                       buffer[position++] = tx_cfg.address_byte;
+                       device->buffer[position++] = tx_cfg.address_byte;
 
                /* finally get message data from fifo */
-               retval = kfifo_out(&device->tx_fifo, &buffer[position], 
sizeof(buffer) - position);
+               retval = kfifo_out(&device->tx_fifo, &device->buffer[position], 
sizeof(device->buffer) - position);
                dev_dbg(device->dev, "read %d message byte(s) from fifo 
queue.", retval);
                mutex_unlock(&device->tx_fifo_lock);
 
@@ -708,7 +707,7 @@ static irqreturn_t DIO1_irq_handler(int irq, void *dev_id)
                                int temp = device->free_in_fifo;
                                device->free_in_fifo = 0;
                                rf69_write_fifo(spi,
-                                               &buffer[position],
+                                               &device->buffer[position],
                                                temp);
                                position += temp;
                        } else {
@@ -716,7 +715,7 @@ static irqreturn_t DIO1_irq_handler(int irq, void *dev_id)
                                device->free_in_fifo -= size;
                                repetitions--;
                                rf69_write_fifo(spi,
-                                               &buffer[position],
+                                               &device->buffer[position],
                                                (size - position));
                                position = 0; /* reset for next repetition */
                        }
-- 
1.7.10.4