From: Douglas Anderson <dianders@chromium.org>
To: gregkh@linuxfoundation.org
Cc: msavaliy@codeaurora.org, linux-arm-msm@vger.kernel.org,
alokc@codeaurora.org, mka@chromium.org, evgreen@chromium.org,
Douglas Anderson <dianders@chromium.org>,
linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
Jiri Slaby <jslaby@suse.com>
Subject: [PATCH] tty: serial: qcom_geni_serial: Don't slow all ports just for kgdb
Date: Mon, 15 Oct 2018 13:44:24 -0700 [thread overview]
Message-ID: <20181015204425.84537-1-dianders@chromium.org> (raw)
If you turn on CONFIG_KGDB then you'll get CONFIG_CONSOLE_POLL
selected.
If you have CONFIG_CONSOLE_POLL selected then the GENI serial driver
was setting RX_BYTES_PW to 1 for _all_ UART ports.
This doesn't seem like such a good idea. Let's only set RX_BYTES_PW
to 1 for the console port.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
---
drivers/tty/serial/qcom_geni_serial.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index d3b5261ee80a..9ee6ce725e43 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -89,9 +89,9 @@
#define MAX_LOOPBACK_CFG 3
#ifdef CONFIG_CONSOLE_POLL
-#define RX_BYTES_PW 1
+#define CONSOLE_RX_BYTES_PW 1
#else
-#define RX_BYTES_PW 4
+#define CONSOLE_RX_BYTES_PW 4
#endif
struct qcom_geni_serial_port {
@@ -853,11 +853,13 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport)
unsigned int rxstale = DEFAULT_BITS_PER_CHAR * STALE_TIMEOUT;
u32 proto;
- if (uart_console(uport))
+ if (uart_console(uport)) {
port->tx_bytes_pw = 1;
- else
+ port->rx_bytes_pw = CONSOLE_RX_BYTES_PW;
+ } else {
port->tx_bytes_pw = 4;
- port->rx_bytes_pw = RX_BYTES_PW;
+ port->rx_bytes_pw = 4;
+ }
proto = geni_se_read_proto(&port->se);
if (proto != GENI_SE_UART) {
--
2.19.1.331.ge82ca0e54c-goog
next reply other threads:[~2018-10-15 20:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-15 20:44 Douglas Anderson [this message]
2018-10-16 20:53 ` [PATCH] tty: serial: qcom_geni_serial: Don't slow all ports just for kgdb Stephen Boyd
2018-10-16 20:53 ` Stephen Boyd
2018-10-17 7:34 ` msavaliy
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