From 5ac61d26b8baff5b2e5a9f3dc1ef63297e4b53e7 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@ingics.com>
Date: Wed, 13 Apr 2016 08:54:30 +0800
Subject: [PATCH] i2c: sun6i-p2wi: Prevent potential division by zero
Git-commit: 5ac61d26b8baff5b2e5a9f3dc1ef63297e4b53e7
Patch-mainline: v6.7-rc1
References: git-fixes
Make sure we don't OOPS in case clock-frequency is set to 0 in a DT. The
variable set here is later used as a divisor.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/i2c/busses/i2c-sun6i-p2wi.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/i2c/busses/i2c-sun6i-p2wi.c b/drivers/i2c/busses/i2c-sun6i-p2wi.c
index fa6020dced59..85e035e7a1d7 100644
--- a/drivers/i2c/busses/i2c-sun6i-p2wi.c
+++ b/drivers/i2c/busses/i2c-sun6i-p2wi.c
@@ -201,6 +201,11 @@ static int p2wi_probe(struct platform_device *pdev)
return -EINVAL;
}
+ if (clk_freq == 0) {
+ dev_err(dev, "clock-frequency is set to 0 in DT\n");
+ return -EINVAL;
+ }
+
if (of_get_child_count(np) > 1) {
dev_err(dev, "P2WI only supports one slave device\n");
return -EINVAL;
--
2.35.3