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path: root/drivers/usb/serial/ftdi_sio.c
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Diffstat (limited to 'drivers/usb/serial/ftdi_sio.c')
-rw-r--r--drivers/usb/serial/ftdi_sio.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 609198d9594c..1ab2a6191013 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1130,7 +1130,7 @@ static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base)
{
unsigned short int divisor;
/* divisor shifted 3 bits to the left */
- int divisor3 = base / 2 / baud;
+ int divisor3 = DIV_ROUND_CLOSEST(base, 2 * baud);
if ((divisor3 & 0x7) == 7)
divisor3++; /* round x.7/8 up to x+1 */
divisor = divisor3 >> 3;
@@ -1156,7 +1156,7 @@ static u32 ftdi_232bm_baud_base_to_divisor(int baud, int base)
static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
u32 divisor;
/* divisor shifted 3 bits to the left */
- int divisor3 = base / 2 / baud;
+ int divisor3 = DIV_ROUND_CLOSEST(base, 2 * baud);
divisor = divisor3 >> 3;
divisor |= (u32)divfrac[divisor3 & 0x7] << 14;
/* Deal with special cases for highest baud rates. */
@@ -1179,7 +1179,7 @@ static u32 ftdi_2232h_baud_base_to_divisor(int baud, int base)
int divisor3;
/* hi-speed baud rate is 10-bit sampling instead of 16-bit */
- divisor3 = base * 8 / (baud * 10);
+ divisor3 = DIV_ROUND_CLOSEST(8 * base, 10 * baud);
divisor = divisor3 >> 3;
divisor |= (u32)divfrac[divisor3 & 0x7] << 14;