[lkml]   [2018]   [Jul]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH 1/2] drivers: clk: st: warn on iomap failure
 While the return value of clkgen_get_register_base() is being checked
at the call site, there is no indication of failure cause thus making
diagnosis of the issues hard. The WARN_ON() allows to determine the
cause of failure.

Signed-off-by: Nicholas Mc Guire <>

Problem found by an experimental coccinelle script

Patch was compile tested with: multi_v7_defconfig (implies

Patch is against 4.18-rc4 (localversion-next is next-20180713)

drivers/clk/st/clkgen-pll.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/clk/st/clkgen-pll.c b/drivers/clk/st/clkgen-pll.c
index cbb5184..aeb30ab 100644
--- a/drivers/clk/st/clkgen-pll.c
+++ b/drivers/clk/st/clkgen-pll.c
@@ -647,6 +647,7 @@ static void __iomem * __init clkgen_get_register_base(
return NULL;

reg = of_iomap(pnode, 0);
+ WARN_ON(!reg);

return reg;
 \ /
  Last update: 2018-07-15 22:07    [W:0.048 / U:1.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site