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authorChristophe Ricard <christophe.ricard@gmail.com>2015-03-31 09:02:15 +0300
committerSamuel Ortiz <sameo@linux.intel.com>2015-04-06 01:16:01 +0300
commitd4a41d10b2cb5890aeda6b2912973b2a754b05b1 (patch)
tree2fbff7db8ce08da1d6791138f88e79338b90c276 /drivers/nfc
parent2ca21002798a1a88196a90f407b80df3a25c69dc (diff)
downloadlinux-d4a41d10b2cb5890aeda6b2912973b2a754b05b1.tar.xz
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>
Diffstat (limited to 'drivers/nfc')
-rw-r--r--drivers/nfc/st21nfcb/i2c.c4
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);
}