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path: root/drivers/i2c/busses/i2c-pca-isa.c
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Diffstat (limited to 'drivers/i2c/busses/i2c-pca-isa.c')
-rw-r--r--drivers/i2c/busses/i2c-pca-isa.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-pca-isa.c b/drivers/i2c/busses/i2c-pca-isa.c
index bbd77603a41..29933f87d8f 100644
--- a/drivers/i2c/busses/i2c-pca-isa.c
+++ b/drivers/i2c/busses/i2c-pca-isa.c
@@ -71,8 +71,8 @@ static int pca_isa_readbyte(void *pd, int reg)
static int pca_isa_waitforcompletion(void *pd)
{
- long ret = ~0;
unsigned long timeout;
+ long ret;
if (irq > -1) {
ret = wait_event_timeout(pca_wait,
@@ -81,11 +81,15 @@ static int pca_isa_waitforcompletion(void *pd)
} else {
/* Do polling */
timeout = jiffies + pca_isa_ops.timeout;
- while (((pca_isa_readbyte(pd, I2C_PCA_CON)
- & I2C_PCA_CON_SI) == 0)
- && (ret = time_before(jiffies, timeout)))
+ do {
+ ret = time_before(jiffies, timeout);
+ if (pca_isa_readbyte(pd, I2C_PCA_CON)
+ & I2C_PCA_CON_SI)
+ break;
udelay(100);
+ } while (ret);
}
+
return ret > 0;
}