diff options
| -rw-r--r-- | drivers/i2c/busses/i2c-pasemi.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-pasemi.c b/drivers/i2c/busses/i2c-pasemi.c index 79c72dfa63b7..ca18e0be4901 100644 --- a/drivers/i2c/busses/i2c-pasemi.c +++ b/drivers/i2c/busses/i2c-pasemi.c @@ -51,6 +51,7 @@ struct pasemi_smbus { #define MRXFIFO_DATA_M 0x000000ff #define SMSTA_XEN 0x08000000 +#define SMSTA_MTN 0x00200000 #define CTL_MRR 0x00000400 #define CTL_MTR 0x00000200 @@ -98,6 +99,10 @@ static unsigned int pasemi_smb_waitready(struct pasemi_smbus *smbus) 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); |