clk: renesas: Do not test unsigned variable to be less than 0

In rcar_clk_set_rate64_div_table the unsigned variable 'value' is used
to receive the return value from rcar_clk_get_table_val which returns an
int and then attempts to test for being less than 0, which can never be
true. Instead declare value as an int so the code can behave as
expected. Also remove initial values from 'value' and 'div' as they are
not needed.

This issue was found by Smatch.

Signed-off-by: Andrew Goodbody <andrew.goodbody@linaro.org>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

diff --git a/drivers/clk/renesas/rcar-cpg-lib.c b/drivers/clk/renesas/rcar-cpg-lib.c
index ea33bfd3239370a9e95c7f29a503e7b99ded55f1..60ab2cb379ef4cbb69115259d3cdd1cb86141bbd 100644 (file)
--- a/drivers/clk/renesas/rcar-cpg-lib.c
+++ b/drivers/clk/renesas/rcar-cpg-lib.c
@@ -92,7 +92,8 @@ int rcar_clk_set_rate64_div_table(unsigned int parent, u64 parent_rate, ulong ra
                                  void __iomem *reg, const u32 mask,
                                  const struct clk_div_table *table, char *name)
 {
-       u32 value = 0, div = 0;
+       u32 div;
+       int value;
 
        div = DIV_ROUND_CLOSEST(parent_rate, rate);
        value = rcar_clk_get_table_val(table, div);
@@ -101,7 +102,7 @@ int rcar_clk_set_rate64_div_table(unsigned int parent, u64 parent_rate, ulong ra
 
        clrsetbits_le32(reg, mask, field_prep(mask, value));
 
-       debug("%s[%i] %s clk: parent=%i div=%u rate=%lu => val=%u\n",
+       debug("%s[%i] %s clk: parent=%i div=%u rate=%lu => val=%d\n",
              __func__, __LINE__, name, parent, div, rate, value);
 
        return 0;