clk: st: avoid uninitialized variable use

commit 2dd52d7f6f9d9d03a82a68040ac3d221dd79af94 upstream.

quadfs_pll_fs660c32_round_rate prints a few structure members
that are never initialized, and also doesn't print the only one
it cares about. We get a gcc warning about the ones that
are printed:

clk/st/clkgen-fsyn.c:560:93: warning: 'params.sdiv' may be used uninitialized in this function
clk/st/clkgen-fsyn.c:560:93: warning: 'params.mdiv' may be used uninitialized in this function
clk/st/clkgen-fsyn.c:560:93: warning: 'params.pe' may be used uninitialized in this function
clk/st/clkgen-fsyn.c:560:93: warning: 'params.nsdiv' may be used uninitialized in this function

This changes the code to no longer print uninitialized data, and
for good measure it also prints the ndiv member that is being
set.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 5f7aa9071e93 ("clk: st: Support for QUADFS inside ClockGenB/C/D/E/F")
Acked-by: Gabriel Fernandez <gabriel.fernandez@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

diff --git a/drivers/clk/st/clkgen-fsyn.c b/drivers/clk/st/clkgen-fsyn.c
index 4f53ee0778d995800a1329050ef508f48f271933..bc298dc329d7ac45529a4570c68b536bcd975dc1 100644 (file)
--- a/drivers/clk/st/clkgen-fsyn.c
+++ b/drivers/clk/st/clkgen-fsyn.c
@@ -408,19 +408,20 @@ int clk_fs660c32_vco_get_params(unsigned long input,
        return 0;
 }
 
-static long quadfs_pll_fs660c32_round_rate(struct clk_hw *hw, unsigned long rate
-               , unsigned long *prate)
+static long quadfs_pll_fs660c32_round_rate(struct clk_hw *hw,
+                                          unsigned long rate,
+                                          unsigned long *prate)
 {
        struct stm_fs params;
 
-       if (!clk_fs660c32_vco_get_params(*prate, rate, &params))
-               clk_fs660c32_vco_get_rate(*prate, &params, &rate);
+       if (clk_fs660c32_vco_get_params(*prate, rate, &params))
+               return rate;
 
-       pr_debug("%s: %s new rate %ld [sdiv=0x%x,md=0x%x,pe=0x%x,nsdiv3=%u]\n",
+       clk_fs660c32_vco_get_rate(*prate, &params, &rate);
+
+       pr_debug("%s: %s new rate %ld [ndiv=%u]\n",
                 __func__, __clk_get_name(hw->clk),
-                rate, (unsigned int)params.sdiv,
-                (unsigned int)params.mdiv,
-                (unsigned int)params.pe, (unsigned int)params.nsdiv);
+                rate, (unsigned int)params.ndiv);
 
        return rate;
 }