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: 3+ 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
2018-10-17 7:34 ` msavaliy
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181015204425.84537-1-dianders@chromium.org \
--to=dianders@chromium.org \
--cc=alokc@codeaurora.org \
--cc=evgreen@chromium.org \
--cc=gregkh@linuxfoundation.org \
--cc=jslaby@suse.com \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-serial@vger.kernel.org \
--cc=mka@chromium.org \
--cc=msavaliy@codeaurora.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).