[PATCH] rtc: rv8803: broaden workaround

[Alexandre Belloni]

The previous workaround may still fail as there are actually 4 retries to
be done to ensure the communication succeed. Also, some I2C adapter drivers
may return -EIO instead of -ENXIO.

Signed-off-by: Alexandre Belloni <alexandre.bell...@free-electrons.com>
---
 drivers/rtc/rtc-rv8803.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-rv8803.c b/drivers/rtc/rtc-rv8803.c
index 82ab41074156..533ca5bcaa96 100644
--- a/drivers/rtc/rtc-rv8803.c
+++ b/drivers/rtc/rtc-rv8803.c
@@ -68,7 +68,7 @@ static irqreturn_t rv8803_handle_irq(int irq, void *dev_id)
        do {
                flags = i2c_smbus_read_byte_data(client, RV8803_FLAG);
                try++;
-       } while ((flags == -ENXIO) && (try < 3));
+       } while (((flags == -ENXIO) || (flags == -EIO)) && (try < 4));
        if (flags <= 0) {
                spin_unlock(&rv8803->flags_lock);
                return IRQ_NONE;
@@ -455,7 +455,7 @@ static int rv8803_probe(struct i2c_client *client,
        do {
                flags = i2c_smbus_read_byte_data(client, RV8803_FLAG);
                try++;
-       } while ((flags == -ENXIO) && (try < 3));
+       } while (((flags == -ENXIO) || (flags == -EIO)) && (try < 4));
 
        if (flags < 0)
                return flags;
@@ -496,7 +496,7 @@ static int rv8803_probe(struct i2c_client *client,
                err = i2c_smbus_write_byte_data(rv8803->client, RV8803_EXT,
                                                RV8803_EXT_WADA);
                try++;
-       } while ((err == -ENXIO) && (try < 3));
+       } while (((err == -ENXIO) || (flags == -EIO)) && (try < 4));
        if (err)
                return err;
 
-- 
2.8.1