From: Markus Elfring <Markus.Elfring@web.de>
To: dri-devel@lists.freedesktop.org,
Linus Walleij <linus.walleij@linaro.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
kernel-janitors@vger.kernel.org, Daniel Vetter <daniel@ffwll.ch>,
David Airlie <airlied@linux.ie>,
Tang Bin <tangbin@cmss.chinamobile.com>
Subject: drm/mcde: Checking for a failed platform_get_irq() call in mcde_probe()
Date: Wed, 8 Apr 2020 14:20:28 +0200 [thread overview]
Message-ID: <abd9674c-adf7-b040-814c-076e32a5a48e@web.de> (raw)
Hello,
I have taken another look at the implementation of the function “mcde_probe”.
A software analysis approach points the following source code out for
further development considerations.
https://elixir.bootlin.com/linux/v5.6.2/source/drivers/gpu/drm/mcde/mcde_drv.c#L401
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/mcde/mcde_drv.c?id=f5e94d10e4c468357019e5c28d48499f677b284f#n402
irq = platform_get_irq(pdev, 0);
if (!irq) {
ret = -EINVAL;
goto clk_disable;
}
The software documentation is providing the following information
for the used programming interface.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/base/platform.c?id=f5e94d10e4c468357019e5c28d48499f677b284f#n221
https://elixir.bootlin.com/linux/v5.6.2/source/drivers/base/platform.c#L202
“…
* Return: IRQ number on success, negative error number on failure.
…”
Would you like to reconsider the shown condition check?
Regards,
Markus
reply other threads:[~2020-04-08 12:20 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=abd9674c-adf7-b040-814c-076e32a5a48e@web.de \
--to=markus.elfring@web.de \
--cc=airlied@linux.ie \
--cc=daniel@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=kernel-janitors@vger.kernel.org \
--cc=linus.walleij@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=tangbin@cmss.chinamobile.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
all inboxes | Powered by JetHome®