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| author | Fabio Estevam <fabio.estevam@freescale.com> | 2015-11-04 08:13:00 -0200 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2015-11-18 02:30:49 +0100 |
| commit | 59df9bb25cf8a13443b8335a7a9013817c050b88 (patch) | |
| tree | 0a06192ae1da3cc488f44039a4ea8d7891c2449a | |
| parent | 7f151f1d8abb7d5930b49d4796b463dca1673cb7 (diff) | |
| download | linux-59df9bb25cf8a13443b8335a7a9013817c050b88.tar.gz linux-59df9bb25cf8a13443b8335a7a9013817c050b88.tar.bz2 linux-59df9bb25cf8a13443b8335a7a9013817c050b88.zip | |
nxp-nci: i2c: Do not check specifically for -EREMOTEIO error
Function nxp_nci_i2c_write currently assumes in case of
I2C bus NACK that the NFC device is in stand-by mode and
will retry the I2C transaction after a pause. This assumes
that the first failed I2C transaction will wake-up the device.
This is done by checking on EREMOTEIO, which is wrong. According
to Documentation/i2c/fault-codes ENXIO shall be used. Unfortunately
the NOACK return code is currently inconsistent across various I2C
host controller drivers. So only check for the generic error case
instead.
This is a temporary fix. As soon as all I2C bus master drivers are
fixed to consistently return 'ENXIO', then we can do the specific
error check again.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
| -rw-r--r-- | drivers/nfc/nxp-nci/i2c.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c index df4333c7ee0f..ec359fc10b48 100644 --- a/drivers/nfc/nxp-nci/i2c.c +++ b/drivers/nfc/nxp-nci/i2c.c @@ -85,7 +85,7 @@ static int nxp_nci_i2c_write(void *phy_id, struct sk_buff *skb) return phy->hard_fault; r = i2c_master_send(client, skb->data, skb->len); - if (r == -EREMOTEIO) { + if (r < 0) { /* Retry, chip was in standby */ usleep_range(110000, 120000); r = i2c_master_send(client, skb->data, skb->len); |