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>

1 files changed, 12 insertions, 25 deletions

diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index e0d35c20c04f..ed76f0a127fd 100644
--- 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);