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clk: st: avoid uninitialized variable use 

My previous patch fixed some warnings about printing a couple
of variables that are always uninitialized in quadfs_pll_fs660c32_set_rate(),
but I now got a warning that only shows up in some configurations (i.e.
without gcc -Os) about the params.ndiv being used uninitialized in the
error case:

drivers/clk/st/clkgen-fsyn.c: In function 'quadfs_pll_fs660c32_set_rate':
drivers/clk/st/clkgen-fsyn.c:584:75: warning: 'params.ndiv' may be used uninitialized in this function [-Wmaybe-uninitialized]
drivers/clk/st/clkgen-fsyn.c:574:16: note: 'params.ndiv' was declared here

This changes the error handling so we bail for invalid arguments rather
than continuing with uninitialized data.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Arnd Bergmann 2016-01-25 16:54:04 +01:00 committed by Stephen Boyd
parent 3d6f1c7212
commit 9849fadfc0
1 changed files with 6 additions and 2 deletions
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8
drivers/clk/st/clkgen-fsyn.c
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@ -574,12 +574,16 @@ static int quadfs_pll_fs660c32_set_rate(struct clk_hw *hw, unsigned long rate,
struct stm_fs params;
long hwrate = 0;
unsigned long flags = 0;
int ret;
if (!rate || !parent_rate)
return -EINVAL;
if (!clk_fs660c32_vco_get_params(parent_rate, rate, &params))
clk_fs660c32_vco_get_rate(parent_rate, &params, &hwrate);
ret = clk_fs660c32_vco_get_params(parent_rate, rate, &params);
if (ret)
return ret;
clk_fs660c32_vco_get_rate(parent_rate, &params, &hwrate);
pr_debug("%s: %s new rate %ld [ndiv=0x%x]\n",
__func__, clk_hw_get_name(hw),