From: Tom Rix <trix@redhat.com>
To: gregkh@linuxfoundation.org, jirislaby@kernel.org,
shawnguo@kernel.org, s.hauer@pengutronix.de,
kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com
Cc: linux-serial@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Tom Rix <trix@redhat.com>
Subject: [PATCH] serial: imx: remove a redundant check
Date: Sat, 11 Feb 2023 07:45:50 -0800 [thread overview]
Message-ID: <20230211154550.2130670-1-trix@redhat.com> (raw)
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@redhat.com>
---
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)) {
--
2.26.3
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next reply other threads:[~2023-02-11 15:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-11 15:45 Tom Rix [this message]
2023-02-11 17:48 ` [PATCH] serial: imx: remove a redundant check Sergey Organov
2023-02-13 8:46 ` Iuliana Prodan
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