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staging: pi433: reduce stack size in tx thread

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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@arndb.de>
Reviewed-by: Marcus Wolf <linux@wolf-entwicklungen.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann 2017-07-31 10:57:47 +02:00 committed by Greg Kroah-Hartman
parent 125a452cdf
commit 62f39d49d1
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/pi433/pi433_if.c
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@ -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;
@ -490,7 +491,7 @@ 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;