Putting a 900 byte array on the stack is a clearly too much in the
kernel, and sometimes results in warnings like:
drivers/staging/pi433/pi433_if.c: In function 'pi433_tx_thread':
drivers/staging/pi433/pi433_if.c:645:1: error: the frame size of 1028 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
This moves the buffer into the dynamically allocated per-device
structure.
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/staging/pi433/pi433_if.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c
index ed737f4b1e77..ec9811ae4735 100644
--- a/drivers/staging/pi433/pi433_if.c
+++ b/drivers/staging/pi433/pi433_if.c
@@ -92,6 +92,7 @@ struct pi433_device {
struct task_struct *tx_task_struct;
wait_queue_head_t tx_wait_queue;
u8 free_in_fifo;
+ char buffer[MAX_MSG_SIZE];
/* rx related values */
struct pi433_rx_cfg rx_cfg;
@@ -471,7 +472,7 @@ pi433_tx_thread(void *data)
struct pi433_device *device = data;
struct spi_device *spi = device->spi; /* needed for SET_CHECKED */
struct pi433_tx_cfg tx_cfg;
- u8 buffer[MAX_MSG_SIZE];
+ u8 *buffer = device->buffer;
size_t size;
bool rx_interrupted = false;
int position, repetitions;
--
2.9.0
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