From: wsa@the-dreams.de (Wolfram Sang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 4/6] pwm: pwm-lpc18xx-sct: test clock rate to avoid division by 0
Date: Wed, 2 Mar 2016 23:33:35 +0100 [thread overview]
Message-ID: <1456958018-7849-5-git-send-email-wsa@the-dreams.de> (raw)
In-Reply-To: <1456958018-7849-1-git-send-email-wsa@the-dreams.de>
From: Wolfram Sang <wsa+renesas@sang-engineering.com>
The clk API may return 0 on clk_get_rate, so we should check the result before
using it as a divisor.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
Should go individually via subsystem tree.
drivers/pwm/pwm-lpc18xx-sct.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/pwm/pwm-lpc18xx-sct.c b/drivers/pwm/pwm-lpc18xx-sct.c
index 9163085101bc94..6487962c355c03 100644
--- a/drivers/pwm/pwm-lpc18xx-sct.c
+++ b/drivers/pwm/pwm-lpc18xx-sct.c
@@ -360,6 +360,8 @@ static int lpc18xx_pwm_probe(struct platform_device *pdev)
}
lpc18xx_pwm->clk_rate = clk_get_rate(lpc18xx_pwm->pwm_clk);
+ if (!lpc18xx_pwm->clk_rate)
+ return -EINVAL;
mutex_init(&lpc18xx_pwm->res_lock);
mutex_init(&lpc18xx_pwm->period_lock);
--
2.7.0
next prev parent reply other threads:[~2016-03-02 22:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-02 22:33 [PATCH 0/6] treewide: test clock rate to avoid division by 0 Wolfram Sang
2016-03-02 22:33 ` Wolfram Sang [this message]
2016-03-02 22:44 ` [PATCH 4/6] pwm: pwm-lpc18xx-sct: " Joachim Eastwood
2016-03-02 22:58 ` Wolfram Sang
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