Turns out we don't actually check the status to see if there was a
device out there to talk to, just if we had a timeout when doing so.
Add the proper check, so we don't falsly think there are devices
on the bus that are not there, etc.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
#define MRXFIFO_DATA_M 0x000000ff
#define SMSTA_XEN 0x08000000
+#define SMSTA_MTN 0x00200000
#define CTL_MRR 0x00000400
#define CTL_MTR 0x00000200
status = reg_read(smbus, REG_SMSTA);
}
+ /* Got NACK? */
+ if (status & SMSTA_MTN)
+ return -ENXIO;
+
if (timeout < 0) {
dev_warn(&smbus->dev->dev, "Timeout, status 0x%08x\n", status);
reg_write(smbus, REG_SMSTA, status);