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| author | Kees Cook <keescook@chromium.org> | 2020-06-15 12:13:00 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2020-07-16 12:32:26 -0700 |
| commit | fec61ff40b9e2a2439332eaca498aebe4eb5e056 (patch) | |
| tree | 93016e1a5fee704c88d4e79d6e7e6b88bc35c828 /drivers/clk/spear | |
| parent | 14dd1c3af6ce73adc1bb322e6297a26d8b668942 (diff) | |
| download | linux-fec61ff40b9e2a2439332eaca498aebe4eb5e056.tar.gz linux-fec61ff40b9e2a2439332eaca498aebe4eb5e056.tar.bz2 linux-fec61ff40b9e2a2439332eaca498aebe4eb5e056.zip | |
clk: spear: Remove uninitialized_var() usage
Using uninitialized_var() is dangerous as it papers over real bugs[1]
(or can in the future), and suppresses unrelated compiler warnings (e.g.
"unused variable"). If the compiler thinks it is uninitialized, either
simply initialize the variable or make compiler changes. As a precursor
to removing[2] this[3] macro[4], initialize "i" to zero. The compiler
warning was not a false positive, since clk_pll_set_rate()'s call to
clk_pll_round_rate_index() will always fail (since "prate" is NULL), so
"i" was never being initialized.
[1] https://lore.kernel.org/lkml/20200603174714.192027-1-glider@google.com/
[2] https://lore.kernel.org/lkml/CA+55aFw+Vbj0i=1TGqCR5vQkCzWJ0QxK6CernOU6eedsudAixw@mail.gmail.com/
[3] https://lore.kernel.org/lkml/CA+55aFwgbgqhbp1fkxvRKEpzyR5J8n1vKT1VZdz9knmPuXhOeg@mail.gmail.com/
[4] https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yVJu65TpLgN_ybYNv0VEOKA@mail.gmail.com/
Fixes: 7d4998f71b29 ("clk: SPEAr: Vco-pll: Fix compilation warning")
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'drivers/clk/spear')
| -rw-r--r-- | drivers/clk/spear/clk-vco-pll.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/clk/spear/clk-vco-pll.c b/drivers/clk/spear/clk-vco-pll.c index c08dec30bfa6..fed194169666 100644 --- a/drivers/clk/spear/clk-vco-pll.c +++ b/drivers/clk/spear/clk-vco-pll.c @@ -147,7 +147,7 @@ static int clk_pll_set_rate(struct clk_hw *hw, unsigned long drate, struct clk_pll *pll = to_clk_pll(hw); struct pll_rate_tbl *rtbl = pll->vco->rtbl; unsigned long flags = 0, val; - int uninitialized_var(i); + int i = 0; clk_pll_round_rate_index(hw, drate, NULL, &i); |