From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Kent Gibson <warthog618@gmail.com>,
Linus Walleij <linus.walleij@linaro.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Jiri Kosina <jkosina@suse.cz>,
Stefani Seibold <stefani@seibold.net>
Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [RESEND PATCH v5 4/7] gpiolib: emit a debug message when adding events to a full kfifo
Date: Thu, 23 Jan 2020 15:05:03 +0100 [thread overview]
Message-ID: <20200123140506.29275-5-brgl@bgdev.pl> (raw)
In-Reply-To: <20200123140506.29275-1-brgl@bgdev.pl>
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Currently if the line-event kfifo is full, we just silently drop any new
events. Add a ratelimited debug message so that we at least have some
trace in the kernel log of event overflow.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
drivers/gpio/gpiolib.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 43c96e7cdc48..6b5d102dfb13 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -987,6 +987,8 @@ static irqreturn_t lineevent_irq_thread(int irq, void *p)
1, &le->wait.lock);
if (ret)
wake_up_poll(&le->wait, EPOLLIN);
+ else
+ pr_debug_ratelimited("event FIFO is full - event dropped\n");
return IRQ_HANDLED;
}
--
2.23.0
next prev parent reply other threads:[~2020-01-23 14:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-23 14:04 [RESEND PATCH v5 0/7] gpiolib: add an ioctl() for monitoring line status changes Bartosz Golaszewski
2020-01-23 14:05 ` [RESEND PATCH v5 1/7] kfifo: provide noirqsave variants of spinlocked in and out helpers Bartosz Golaszewski
2020-01-23 14:05 ` [RESEND PATCH v5 2/7] kfifo: provide kfifo_is_empty_spinlocked() Bartosz Golaszewski
2020-01-23 14:05 ` [RESEND PATCH v5 3/7] gpiolib: rework the locking mechanism for lineevent kfifo Bartosz Golaszewski
2020-01-23 14:05 ` Bartosz Golaszewski [this message]
2020-01-23 14:05 ` [RESEND PATCH v5 5/7] gpiolib: provide a dedicated function for setting lineinfo Bartosz Golaszewski
2020-01-23 14:05 ` [RESEND PATCH v5 6/7] gpiolib: add new ioctl() for monitoring changes in line info Bartosz Golaszewski
2020-01-23 14:49 ` Andy Shevchenko
2020-01-23 14:05 ` [RESEND PATCH v5 7/7] tools: gpio: implement gpio-watch Bartosz Golaszewski
2020-01-23 14:50 ` [RESEND PATCH v5 0/7] gpiolib: add an ioctl() for monitoring line status changes Andy Shevchenko
2020-01-23 15:24 ` Bartosz Golaszewski
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=20200123140506.29275-5-brgl@bgdev.pl \
--to=brgl@bgdev.pl \
--cc=akpm@linux-foundation.org \
--cc=andriy.shevchenko@linux.intel.com \
--cc=bgolaszewski@baylibre.com \
--cc=gregkh@linuxfoundation.org \
--cc=jkosina@suse.cz \
--cc=linus.walleij@linaro.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=stefani@seibold.net \
--cc=warthog618@gmail.com \
/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).