diff options
| author | Christophe Ricard <christophe.ricard@gmail.com> | 2015-03-31 08:02:15 +0200 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2015-04-06 00:16:01 +0200 |
| commit | d4a41d10b2cb5890aeda6b2912973b2a754b05b1 (patch) | |
| tree | 2fbff7db8ce08da1d6791138f88e79338b90c276 | |
| parent | 2ca21002798a1a88196a90f407b80df3a25c69dc (diff) | |
| download | linux-d4a41d10b2cb5890aeda6b2912973b2a754b05b1.tar.bz2 | |
NFC: st21nfcb: Retry i2c_master_send if it returns a negative value
i2c_master_send may return many negative values different than
-EREMOTEIO.
In case an i2c transaction is NACK'ed, on raspberry pi B+
kernel 3.18, -EIO is generated instead.
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
| -rw-r--r-- | drivers/nfc/st21nfcb/i2c.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/nfc/st21nfcb/i2c.c b/drivers/nfc/st21nfcb/i2c.c index eb886932d972..7b53a5c84041 100644 --- a/drivers/nfc/st21nfcb/i2c.c +++ b/drivers/nfc/st21nfcb/i2c.c @@ -109,7 +109,7 @@ static int st21nfcb_nci_i2c_write(void *phy_id, struct sk_buff *skb) return phy->ndlc->hard_fault; r = i2c_master_send(client, skb->data, skb->len); - if (r == -EREMOTEIO) { /* Retry, chip was in standby */ + if (r < 0) { /* Retry, chip was in standby */ usleep_range(1000, 4000); r = i2c_master_send(client, skb->data, skb->len); } @@ -148,7 +148,7 @@ static int st21nfcb_nci_i2c_read(struct st21nfcb_i2c_phy *phy, struct i2c_client *client = phy->i2c_dev; r = i2c_master_recv(client, buf, ST21NFCB_NCI_I2C_MIN_SIZE); - if (r == -EREMOTEIO) { /* Retry, chip was in standby */ + if (r < 0) { /* Retry, chip was in standby */ usleep_range(1000, 4000); r = i2c_master_recv(client, buf, ST21NFCB_NCI_I2C_MIN_SIZE); } |