Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964772AbbEBTPS (ORCPT ); Sat, 2 May 2015 15:15:18 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:44706 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754141AbbEBTPJ (ORCPT ); Sat, 2 May 2015 15:15:09 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christophe Ricard , Samuel Ortiz Subject: [PATCH 4.0 103/220] NFC: st21nfcb: Retry i2c_master_send if it returns a negative value Date: Sat, 2 May 2015 21:00:18 +0200 Message-Id: <20150502185858.794047868@linuxfoundation.org> X-Mailer: git-send-email 2.3.7 In-Reply-To: <20150502185854.333748961@linuxfoundation.org> References: <20150502185854.333748961@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1686 Lines: 48 4.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Christophe Ricard commit d4a41d10b2cb5890aeda6b2912973b2a754b05b1 upstream. 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. Signed-off-by: Christophe Ricard Signed-off-by: Samuel Ortiz Signed-off-by: Greg Kroah-Hartman --- drivers/nfc/st21nfcb/i2c.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/nfc/st21nfcb/i2c.c +++ b/drivers/nfc/st21nfcb/i2c.c @@ -109,7 +109,7 @@ static int st21nfcb_nci_i2c_write(void * 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 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); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/