Commit ac633ba6 authored by Christophe Ricard's avatar Christophe Ricard Committed by Samuel Ortiz

NFC: st21nfcb: Fix logic when running into i2c read retry

When retrying to read the NCI header, the CLF might not be
available the first time. However it may not be successful
the second time and this may cause an error in the function.
Enforce the retrieve data length is as expected.
Signed-off-by: default avatarChristophe Ricard <[email protected]>
Signed-off-by: default avatarSamuel Ortiz <[email protected]>
parent 56f1ffcc
......@@ -168,7 +168,9 @@ static int st21nfcb_nci_i2c_read(struct st21nfcb_i2c_phy *phy,
if (r == -EREMOTEIO) { /* Retry, chip was in standby */
usleep_range(1000, 4000);
r = i2c_master_recv(client, buf, ST21NFCB_NCI_I2C_MIN_SIZE);
} else if (r != ST21NFCB_NCI_I2C_MIN_SIZE) {
}
if (r != ST21NFCB_NCI_I2C_MIN_SIZE) {
nfc_err(&client->dev, "cannot read ndlc & nci header\n");
return -EREMOTEIO;
}
......
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