Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux...

[deliverable/linux.git] / sound / soc / s3c24xx / s3c-i2s-v2.c

diff --git a/sound/soc/s3c24xx/s3c-i2s-v2.c b/sound/soc/s3c24xx/s3c-i2s-v2.c
index aa7af0b8d421e121996332cc71bcafb1b11eaf35..9bc4aa35caab477f918f6f574fadb8ffbf75f319 100644 (file)
--- a/sound/soc/s3c24xx/s3c-i2s-v2.c
+++ b/sound/soc/s3c24xx/s3c-i2s-v2.c
@@ -230,6 +230,8 @@ static void s3c2412_snd_rxctrl(struct s3c_i2sv2_info *i2s, int on)
        pr_debug("%s: IIS: CON=%x MOD=%x FIC=%x\n", __func__, con, mod, fic);
 }
 
+#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
+
 /*
  * Wait for the LR signal to allow synchronisation to the L/R clock
  * from the codec. May only be needed for slave mode.
@@ -237,19 +239,21 @@ static void s3c2412_snd_rxctrl(struct s3c_i2sv2_info *i2s, int on)
 static int s3c2412_snd_lrsync(struct s3c_i2sv2_info *i2s)
 {
        u32 iiscon;
-       unsigned long timeout = jiffies + msecs_to_jiffies(5);
+       unsigned long loops = msecs_to_loops(5);
 
        pr_debug("Entered %s\n", __func__);
 
-       while (1) {
+       while (--loops) {
                iiscon = readl(i2s->regs + S3C2412_IISCON);
                if (iiscon & S3C2412_IISCON_LRINDEX)
                        break;
 
-               if (timeout < jiffies) {
-                       printk(KERN_ERR "%s: timeout\n", __func__);
-                       return -ETIMEDOUT;
-               }
+               cpu_relax();
+       }
+
+       if (!loops) {
+               printk(KERN_ERR "%s: timeout\n", __func__);
+               return -ETIMEDOUT;
        }
 
        return 0;