[PATCH] serial: msm_geni: fix clock rate return type truncation

[Naveen Kumar Chaudhary]

get_clk_cfg() and get_clk_div_rate() return 'int' but operate on
'unsigned long' clock frequencies. If a supported frequency exceeds
INT_MAX, the return value gets silently truncated or sign-extended,
causing the caller to misinterpret valid clock rates.

Change both functions to return 'unsigned long' to match the data type
they actually operate on. This matches the callers accepted data types
as well.

Signed-off-by: Naveen Kumar Chaudhary <naveen.osdev at gmail.com>
---
 drivers/serial/serial_msm_geni.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/serial/serial_msm_geni.c b/drivers/serial/serial_msm_geni.c
index 3dca581f68f..9de193355e4 100644
--- a/drivers/serial/serial_msm_geni.c
+++ b/drivers/serial/serial_msm_geni.c
@@ -109,7 +109,7 @@ unsigned long root_freq[] = {7372800,  14745600, 19200000, 29491200,
  *
  * Return: frequency, supported by clock supplier, multiple of clk_freq.
  */
-static int get_clk_cfg(unsigned long clk_freq)
+static unsigned long get_clk_cfg(unsigned long clk_freq)
 {
 	for (int i = 0; i < ARRAY_SIZE(root_freq); i++) {
 		if (!(root_freq[i] % clk_freq))
@@ -130,7 +130,7 @@ static int get_clk_cfg(unsigned long clk_freq)
  *
  * Return: frequency, supported by clock supplier, multiple of clk_freq.
  */
-static int get_clk_div_rate(u32 baud, u64 sampling_rate, u32 *clk_div)
+static unsigned long get_clk_div_rate(u32 baud, u64 sampling_rate, u32 *clk_div)
 {
 	unsigned long ser_clk;
 	unsigned long desired_clk;
-- 
2.43.0