[PATCH AUTOSEL for 4.4 111/167] clk: scpi: fix return type of __scpi_dvfs_round_rate

Sasha Levin
2018-03-19T16:10:34Z

From: Sudeep Holla <sudeep.holla@arm.com>

[ Upstream commit 7374aec95636ca39409545eba4ef5ff3125c2346 ]

The frequencies above the maximum value of signed integer(i.e. 2^31 -1)
will overflow with the current code.

This patch fixes the return type of __scpi_dvfs_round_rate from 'int'
to 'unsigned long'.

Fixes: cd52c2a4b5c4 ("clk: add support for clocks provided by SCP(System Control Processor)")
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
drivers/clk/clk-scpi.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/clk-scpi.c b/drivers/clk/clk-scpi.c
index cd0f2726f5e0..c40445488d3a 100644
--- a/drivers/clk/clk-scpi.c
+++ b/drivers/clk/clk-scpi.c
@@ -71,15 +71,15 @@ static const struct clk_ops scpi_clk_ops = {
};

/* find closest match to given frequency in OPP table */
-static int __scpi_dvfs_round_rate(struct scpi_clk *clk, unsigned long rate)
+static long __scpi_dvfs_round_rate(struct scpi_clk *clk, unsigned long rate)
{
int idx;
- u32 fmin = 0, fmax = ~0, ftmp;
+ unsigned long fmin = 0, fmax = ~0, ftmp;
const struct scpi_opp *opp = clk->info->opps;

for (idx = 0; idx < clk->info->count; idx++, opp++) {
ftmp = opp->freq;
- if (ftmp >= (u32)rate) {
+ if (ftmp >= rate) {
if (ftmp <= fmax)
fmax = ftmp;
break;
--
2.14.1