linux-kernel - [PATCH] pci: hda: Add IRQ check for platform_get

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Date:   Tue, 22 Jun 2021 21:19:42 +0800
From:   Jiajun Cao <jjcao20@...an.edu.cn>
To:     unlisted-recipients:; (no To-header on input)
Cc:     yuanxzhang@...an.edu.cn, Jiajun Cao <jjcao20@...an.edu.cn>,
        Xin Tan <tanxin.ctf@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Dmitry Osipenko <digetx@...il.com>,
        Mohan Kumar <mkumard@...dia.com>,
        Peter Geis <pgwipeout@...il.com>, alsa-devel@...a-project.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] pci: hda: Add IRQ check for platform_get_irq()

The function hda_tegra_first_init() neglects to check the return
value after executing platform_get_irq().

hda_tegra_first_init() should check the return value (if negative
error number) for errors so as to not pass a negative value to
the devm_request_irq().

Fix it by adding a check for the return value irq_id.

Signed-off-by: Jiajun Cao <jjcao20@...an.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@...il.com>
---
 sound/pci/hda/hda_tegra.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c
index 6f2b743b9d75..6c6dc3fcde60 100644
--- a/sound/pci/hda/hda_tegra.c
+++ b/sound/pci/hda/hda_tegra.c
@@ -262,6 +262,9 @@ static int hda_tegra_first_init(struct azx *chip, struct platform_device *pdev)
 	const char *sname, *drv_name = "tegra-hda";
 	struct device_node *np = pdev->dev.of_node;
 
+	if (irq_id < 0)
+		return irq_id;
+
 	err = hda_tegra_init_chip(chip, pdev);
 	if (err)
 		return err;
-- 
2.17.1