target/linux/ramips/patches-6.1/007-v6.5-clk-ralink-mtmips-Fix-uninitialized-use-of-ret-in-mt.patch

   1 From 6e68dae946e3a0333fbde5487ce163142ca10ae0 Mon Sep 17 00:00:00 2001
   2 From: Nathan Chancellor <nathan@kernel.org>
   3 Date: Thu, 22 Jun 2023 15:56:19 +0000
   4 Subject: clk: ralink: mtmips: Fix uninitialized use of ret in
   5  mtmips_register_{fixed,factor}_clocks()
   6
   7 Clang warns:
   8
   9   drivers/clk/ralink/clk-mtmips.c:309:9: error: variable 'ret' is uninitialized when used here [-Werror,-Wuninitialized]
  10     309 |         return ret;
  11         |                ^~~
  12   drivers/clk/ralink/clk-mtmips.c:285:9: note: initialize the variable 'ret' to silence this warning
  13     285 |         int ret, i;
  14         |                ^
  15         |                 = 0
  16   drivers/clk/ralink/clk-mtmips.c:359:9: error: variable 'ret' is uninitialized when used here [-Werror,-Wuninitialized]
  17     359 |         return ret;
  18         |                ^~~
  19   drivers/clk/ralink/clk-mtmips.c:335:9: note: initialize the variable 'ret' to silence this warning
  20     335 |         int ret, i;
  21         |                ^
  22         |                 = 0
  23   2 errors generated.
  24
  25 Set ret to the return value of clk_hw_register_fixed_rate() using the
  26 PTR_ERR() macro, which ensures ret is not used uninitialized, clearing
  27 up the warning.
  28
  29 Fixes: 6f3b15586eef ("clk: ralink: add clock and reset driver for MTMIPS SoCs")
  30 Closes: https://github.com/ClangBuiltLinux/linux/issues/1879
  31 Signed-off-by: Nathan Chancellor <nathan@kernel.org>
  32 Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
  33 Acked-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
  34 Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
  35 ---
  36  drivers/clk/ralink/clk-mtmips.c | 2 ++
  37  1 file changed, 2 insertions(+)
  38
  39 --- a/drivers/clk/ralink/clk-mtmips.c
  40 +++ b/drivers/clk/ralink/clk-mtmips.c
  41 @@ -292,6 +292,7 @@ static int mtmips_register_fixed_clocks(
  42                                                       sclk->parent, 0,
  43                                                       sclk->rate);
  44                 if (IS_ERR(sclk->hw)) {
  45 +                       ret = PTR_ERR(sclk->hw);
  46                         pr_err("Couldn't register fixed clock %d\n", idx);
  47                         goto err_clk_unreg;
  48                 }
  49 @@ -342,6 +343,7 @@ static int mtmips_register_factor_clocks
  50                                                   sclk->parent, sclk->flags,
  51                                                   sclk->mult, sclk->div);
  52                 if (IS_ERR(sclk->hw)) {
  53 +                       ret = PTR_ERR(sclk->hw);
  54                         pr_err("Couldn't register factor clock %d\n", idx);
  55                         goto err_clk_unreg;
  56                 }