From: Thierry Escande Date: Thu, 16 Jun 2016 18:24:42 +0000 (+0200) Subject: NFC: digital: Rework error handling in DEP_RES response X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3f89fea35fc37b326d6b3697fcc9cba235a60811;p=linux-beck.git 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 Signed-off-by: Samuel Ortiz --- diff --git a/net/nfc/digital_dep.c b/net/nfc/digital_dep.c index f72be7433df3..b62c85dc12a2 100644 --- a/net/nfc/digital_dep.c +++ b/net/nfc/digital_dep.c @@ -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;