Char: moxa, eliminate busy waiting

blah, moxa delays 250+ ms in busy waiting, use msleep instead.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index e0d35c20c04fe3d5ceb7030d60077bd6cfdc2152..ed76f0a127fd759c1679a908681c25fcdfc15064 100644 (file)
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -1405,7 +1405,6 @@ static int moxaCard;
 static struct mon_str moxaLog;
 static int moxaFuncTout = HZ / 2;
 
-static void moxadelay(int);
 static void moxafunc(void __iomem *, int, ushort);
 static void wait_finish(void __iomem *);
 static void low_water_check(void __iomem *);
@@ -2404,10 +2403,10 @@ void MoxaPortSendBreak(int port, int ms100)
        ofsAddr = moxa_ports[port].tableAddr;
        if (ms100) {
                moxafunc(ofsAddr, FC_SendBreak, Magic_code);
-               moxadelay(ms100 * (HZ / 10));
+               msleep(ms100 * 10);
        } else {
                moxafunc(ofsAddr, FC_SendBreak, Magic_code);
-               moxadelay(HZ / 4);      /* 250 ms */
+               msleep(250);
        }
        moxafunc(ofsAddr, FC_StopBreak, Magic_code);
 }
@@ -2476,18 +2475,6 @@ static int moxa_set_serial_info(struct moxa_port *info,
 /*****************************************************************************
  *     Static local functions:                                              *
  *****************************************************************************/
-/*
- * moxadelay - delays a specified number ticks
- */
-static void moxadelay(int tick)
-{
-       unsigned long st, et;
-
-       st = jiffies;
-       et = st + tick;
-       while (time_before(jiffies, et));
-}
-
 static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg)
 {
 
@@ -2535,7 +2522,7 @@ static int moxaloadbios(int cardno, unsigned char __user *tmp, int len)
                return -EFAULT;
        baseAddr = moxa_boards[cardno].basemem;
        writeb(HW_reset, baseAddr + Control_reg);       /* reset */
-       moxadelay(1);           /* delay 10 ms */
+       msleep(10);
        for (i = 0; i < 4096; i++)
                writeb(0, baseAddr + i);        /* clear fix page */
        for (i = 0; i < len; i++)
@@ -2713,7 +2700,7 @@ static int moxaloadc218(int cardno, void __iomem *baseAddr, int len)
                        for (i = 0; i < 100; i++) {
                                if (readw(baseAddr + C218_key) == keycode)
                                        break;
-                               moxadelay(1);   /* delay 10 ms */
+                               msleep(10);
                        }
                        if (readw(baseAddr + C218_key) != keycode) {
                                return (-1);
@@ -2725,7 +2712,7 @@ static int moxaloadc218(int cardno, void __iomem *baseAddr, int len)
                for (i = 0; i < 100; i++) {
                        if (readw(baseAddr + C218_key) == keycode)
                                break;
-                       moxadelay(1);   /* delay 10 ms */
+                       msleep(10);
                }
                retry++;
        } while ((readb(baseAddr + C218chksum_ok) != 1) && (retry < 3));
@@ -2736,7 +2723,7 @@ static int moxaloadc218(int cardno, void __iomem *baseAddr, int len)
        for (i = 0; i < 100; i++) {
                if (readw(baseAddr + Magic_no) == Magic_code)
                        break;
-               moxadelay(1);   /* delay 10 ms */
+               msleep(10);
        }
        if (readw(baseAddr + Magic_no) != Magic_code) {
                return (-1);
@@ -2746,7 +2733,7 @@ static int moxaloadc218(int cardno, void __iomem *baseAddr, int len)
        for (i = 0; i < 100; i++) {
                if (readw(baseAddr + Magic_no) == Magic_code)
                        break;
-               moxadelay(1);   /* delay 10 ms */
+               msleep(10);
        }
        if (readw(baseAddr + Magic_no) != Magic_code) {
                return (-1);
@@ -2788,7 +2775,7 @@ static int moxaloadc320(int cardno, void __iomem *baseAddr, int len, int *numPor
                        for (i = 0; i < 10; i++) {
                                if (readw(baseAddr + C320_key) == C320_KeyCode)
                                        break;
-                               moxadelay(1);
+                               msleep(10);
                        }
                        if (readw(baseAddr + C320_key) != C320_KeyCode)
                                return (-1);
@@ -2799,7 +2786,7 @@ static int moxaloadc320(int cardno, void __iomem *baseAddr, int len, int *numPor
                for (i = 0; i < 10; i++) {
                        if (readw(baseAddr + C320_key) == C320_KeyCode)
                                break;
-                       moxadelay(1);
+                       msleep(10);
                }
                retry++;
        } while ((readb(baseAddr + C320chksum_ok) != 1) && (retry < 3));
@@ -2809,7 +2796,7 @@ static int moxaloadc320(int cardno, void __iomem *baseAddr, int len, int *numPor
        for (i = 0; i < 600; i++) {
                if (readw(baseAddr + Magic_no) == Magic_code)
                        break;
-               moxadelay(1);
+               msleep(10);
        }
        if (readw(baseAddr + Magic_no) != Magic_code)
                return (-100);
@@ -2828,7 +2815,7 @@ static int moxaloadc320(int cardno, void __iomem *baseAddr, int len, int *numPor
        for (i = 0; i < 500; i++) {
                if (readw(baseAddr + Magic_no) == Magic_code)
                        break;
-               moxadelay(1);
+               msleep(10);
        }
        if (readw(baseAddr + Magic_no) != Magic_code)
                return (-102);
@@ -2842,7 +2829,7 @@ static int moxaloadc320(int cardno, void __iomem *baseAddr, int len, int *numPor
        for (i = 0; i < 600; i++) {
                if (readw(baseAddr + Magic_no) == Magic_code)
                        break;
-               moxadelay(1);
+               msleep(10);
        }
        if (readw(baseAddr + Magic_no) != Magic_code)
                return (-102);