ide: never called printk statement in ide-taskfile.c::wait_drive_not_busy

Look at wait_drive_not_busy in drivers/ide/ide-taskfile.c:

    static u8 wait_drive_not_busy(ide_drive_t *drive)
    {
            ide_hwif_t *hwif = HWIF(drive);
            int retries = 100;
            u8 stat;

            /*
             * Last sector was transfered, wait until drive is ready.
             * This can take up to 10 usec, but we will wait max 1 ms
             * (drive_cmd_intr() waits that long).
             */
            while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
                    udelay(10);

            if (!retries)
                    printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);

            return stat;
    }

`printk' is never called because `retries' never holds zero at the
outside of `while' loop: when `retries' holds zero at the while's loop
condition, `retries' will hold -1 at the if condition.

Signed-off-by: Masatake YAMATO <jet@gyve.org>
Cc: Chuck Ebbert <cebbert@redhat.com>
Cc: joe@perches.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 30175c7688e877016e0bd666bcfa4b8ca5e92ad4..aa06dafb74acb09dd4383e5a3c7421dcc13db2b7 100644 (file)
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -238,7 +238,7 @@ EXPORT_SYMBOL(task_no_data_intr);
 static u8 wait_drive_not_busy(ide_drive_t *drive)
 {
        ide_hwif_t *hwif = HWIF(drive);
-       int retries = 100;
+       int retries;
        u8 stat;
 
        /*
@@ -246,10 +246,14 @@ static u8 wait_drive_not_busy(ide_drive_t *drive)
         * This can take up to 10 usec, but we will wait max 1 ms
         * (drive_cmd_intr() waits that long).
         */
-       while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
-               udelay(10);
+       for (retries = 0; retries < 100; retries++) {
+               if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
+                       udelay(10);
+               else
+                       break;
+       }
 
-       if (!retries)
+       if (stat & BUSY_STAT)
                printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 
        return stat;