On 2/11/2023 5:45 PM, Tom Rix wrote:
cpp_check reports
drivers/tty/serial/imx.c:1207:15: style: Condition 'r_bytes>0' is always true [knownConditionTrueFalse]
if (r_bytes > 0) {
r_byte is set to
r_bytes = rx_ring->head - rx_ring->tail;
The head - tail calculation is also done by the earlier check
if (rx_ring->head <= sg_dma_len(sgl) &&
rx_ring->head > rx_ring->tail) {
so r_bytes will always be > 0, so the second check is not needed.
Signed-off-by: Tom Rix <trix@xxxxxxxxxx>
Reviewed-by: Iuliana Prodan <iuliana.prodan@xxxxxxx>
---
drivers/tty/serial/imx.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 363c77a140f0..523f296d5747 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1204,11 +1204,9 @@ static void imx_uart_dma_rx_callback(void *data)
r_bytes = rx_ring->head - rx_ring->tail;
/* If we received something, check for 0xff flood */
- if (r_bytes > 0) {
- spin_lock(&sport->port.lock);
- imx_uart_check_flood(sport, imx_uart_readl(sport, USR2));
- spin_unlock(&sport->port.lock);
- }
+ spin_lock(&sport->port.lock);
+ imx_uart_check_flood(sport, imx_uart_readl(sport, USR2));
+ spin_unlock(&sport->port.lock);
if (!(sport->port.ignore_status_mask & URXD_DUMMY_READ)) {
