ide: palm_bk3710: test clock rate to avoid division by 0

0d7ef45c · Wolfram Sang <[email protected]> · 2016-03-02 23:33:32 +01:00

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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Commit: 0d7ef45cdeebcc95d581703f45f6de7b2ee89b8d
Parents: eccf432f

Changes

1 files changed · +2 −0

File	Status	Add	Del	Content
drivers/ide/palm_bk3710.c	modified	+2	−0	View file

drivers/ide/palm_bk3710.c

View file

diff --git a/drivers/ide/palm_bk3710.c b/drivers/ide/palm_bk3710.c
index 8012e43..46427ea 100644
--- a/drivers/ide/palm_bk3710.c
+++ b/drivers/ide/palm_bk3710.c
@@ -325,6 +325,8 @@ static int __init palm_bk3710_probe(struct platform_device *pdev)
 
 	clk_enable(clk);
 	rate = clk_get_rate(clk);
+	if (!rate)
+		return -EINVAL;
 
 	/* NOTE:  round *down* to meet minimum timings; we count in clocks */
 	ideclk_period = 1000000000UL / rate;