diff options
Diffstat (limited to 'drivers/staging/greybus/uart.c')
| -rw-r--r-- | drivers/staging/greybus/uart.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index 52cc9d581ca4..60617cb69a5a 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -587,6 +587,7 @@ static void gb_tty_exit(void); static int gb_uart_connection_init(struct gb_connection *connection) { + size_t max_payload; struct gb_tty *gb_tty; struct device *tty_dev; int retval; @@ -607,8 +608,13 @@ static int gb_uart_connection_init(struct gb_connection *connection) goto error_alloc; } - gb_tty->buffer_payload_max = - gb_operation_get_payload_size_max(connection) - + max_payload = gb_operation_get_payload_size_max(connection); + if (max_payload < sizeof(struct gb_uart_send_data_request)) { + retval = -EINVAL; + goto error_payload; + } + + gb_tty->buffer_payload_max = max_payload - sizeof(struct gb_uart_send_data_request); gb_tty->buffer = kzalloc(gb_tty->buffer_payload_max, GFP_KERNEL); |