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NFC: digital: Rework error handling in DEP_RES response 

The Digital Protocol stack used to send a NACK frame whatever the error
type it receives in digital_in_recv_dep_res(). It actually should only
send a NACK frame on CRC or parity check errors or on any transmission
error if a NACK frame was previously sent. Existing drivers used to send
EIO error for this kind of issues so this patch limits sending of NACK
frames on EIO errors. All other errors will be reported to the upper
layers.

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Thierry Escande 2016-06-16 20:24:42 +02:00 committed by Samuel Ortiz
parent b77693447d
commit 3f89fea35f
1 changed files with 1 additions and 1 deletions
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2
net/nfc/digital_dep.c
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@ -664,7 +664,7 @@ static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg,
rc = PTR_ERR(resp);
resp = NULL;
if (((rc != -ETIMEDOUT) || ddev->nack_count) &&
if ((rc == -EIO || (rc == -ETIMEDOUT && ddev->nack_count)) &&
(ddev->nack_count++ < DIGITAL_NFC_DEP_N_RETRY_NACK)) {
ddev->atn_count = 0;