Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:1 as permitted sender) client-ip=2620:137:e000::3:1;
From:   Frank Li <Frank.Li@nxp.com>
To:     alexandre.belloni@bootlin.com, miquel.raynal@bootlin.com,
        conor.culhane@silvaco.com, joe@perches.com,
        linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org,
        imx@lists.linux.dev
Subject: [PATCH 4/5] i3c: master: svc return actual transfer data len
Date:   Mon, 16 Oct 2023 11:46:31 -0400
Message-Id: <20231016154632.2851957-5-Frank.Li@nxp.com>
In-Reply-To: <20231016154632.2851957-1-Frank.Li@nxp.com>
References: <20231016154632.2851957-1-Frank.Li@nxp.com>
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?s55BwbT+di1ygJjsy++c9ZIyg1r/4g2JZ7mx7+jNLH/zoaNOzFDiYouvX6Ls?=
 =?us-ascii?Q?kWibhokFdEudYhG3xAz4VaP+7gD3s5H7DjLW0UHAFI9EvG9di5VunkHD0Yaj?=
 =?us-ascii?Q?lBTrrfCWXIhzoCaKL0Y9ASrkzsD+xZ/AVzZttxggqgKG+eRvdvqH2b1p+OxV?=
 =?us-ascii?Q?bFQk7ceMzKEzN7zCXrzdZdeIIdt2PzXRt91dQbh1up+hOtLHsJSPkG+0EbeJ?=
 =?us-ascii?Q?lGyWYfQTj1NmPJF9Tqxcuyl7kOStRGd86mtpy3Te2aTgpaF5nH03PnpYzK4e?=
 =?us-ascii?Q?LfGRy2g98YiQQ3IxNrVIL5EbFK2msV+kvKQbY0Ze7IdS0cHcGPlPaOdRkCNK?=
 =?us-ascii?Q?nvfFXhB1KpKRwEqnVURrayr4+yiGEI2WuYiCJVfpyc9baoKsc9kGCU4NbSCk?=
 =?us-ascii?Q?j2+2DfFiX6HemkcGJhr1C43uS6QvzjN+E2vT0fqS5+o/ivS8GJIuiIhvEcvH?=
 =?us-ascii?Q?mdmgsFdZDGD/X3vI73kkxxhobQQMQCbxhTh+4HwH1RguUef/M6vVeqJEvRQQ?=
 =?us-ascii?Q?7SSPWjRd7hKGCmlWC+hIRncg8UuKQpnxB3IJ5rTzDJZRFavBiOA/j8lv6wnT?=
 =?us-ascii?Q?QWSbgp0M4ISyjA6/J30rhQTdawGFtElGMUh2RlI0jzqetESWhwz6r1GWSJah?=
 =?us-ascii?Q?NRwphUxL6g+rYXyNRiQHC+vYvVbta8VnRi7AInUKmKuZLN02zEPJzJ540az4?=
 =?us-ascii?Q?Wazz04/FtT6KlSxxDfRuuezsUgVzZ/T4LPunWYeeVJi/S8BH4bt9tWJivwEG?=
 =?us-ascii?Q?qoFXIz5C6DQ7sYb3gdiJA4agpjU2rNOi8YKxapOyP4hiakTaDQrUhj258OFU?=
 =?us-ascii?Q?+zppjE4QhXrn+plHpqdZ38N1/krQh/X4IigIr7bGtOs23seWbIDoasVHh2es?=
 =?us-ascii?Q?TYa9AWc5Kf9q4U/tagVww+4iRkHgh679RnmKcDJg6hZhqhktn6d5/yi4xkA5?=
 =?us-ascii?Q?DtwU4yKK+ScwB44AUsQHKllfQKxSx7gthKtm01H4NKdT8LddgUus+2RuHzSG?=
 =?us-ascii?Q?8iLk0kSP1X946/zbBmE+gAdAKY5BH4tEjpEdYUKILDTZtErjgBGmIDG20i8V?=
 =?us-ascii?Q?5eSBwxZthKpyDnu6ci5OrqHLWILVCgAtVVGE7ySnKCsGn1XE7R/tFuJQbZBs?=
 =?us-ascii?Q?gfe554D7rgI0v6ifdxGEq8JmsEAKduhdL6tYFsBrxJXTJ00eHIJVssrypV+m?=
 =?us-ascii?Q?38mNS8f0O9fb3kQECTCx2k1mqObeh/coXNYJvXWMptZHDFKcHk25J+1vu05g?=
 =?us-ascii?Q?pogCU2gqULyKZixpDD1HajOIxXIytq7ZT2xQl/axGKTQ3C9M/RDHVqQouISm?=
 =?us-ascii?Q?OZVM+VIw3HAeShXv3c/cNS/j0Zr9qFOTi1ofq2u83XAARentOjobLXKOPQLK?=
 =?us-ascii?Q?vnV4vrIcA4xnWi198l5h4q9OEsi4kS30LEr8Oj6p0vySiDjR+88aXgyIDQH3?=
 =?us-ascii?Q?IxfJT4q18yNiWiOPZVn93cw/i4uzP3rRj8gYhGNo2v86uWwF5JlOV5mP6/hc?=
 =?us-ascii?Q?n4N4zs9VxJ2DywBCy8UpZuDl7LYljTJGtatNljuBvrEIcL4NX1rFJNkoAml9?=
 =?us-ascii?Q?d3Q8tPUP9EtO7qnK8qc=3D?=
X-OriginatorOrg: nxp.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 161f0a0d-488c-4f24-6797-08dbce5f20a4
X-MS-Exchange-CrossTenant-AuthSource: AM6PR04MB4838.eurprd04.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Oct 2023 15:46:56.9398
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: VCx1GMDBNUymHlGT9sARvJMbYQ3aHpIjC74ifTcRNHCBehZTlK4FOyogFMYFMPVGefxyjrSW+ZxTT+yjThZVCw==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR04MB8329
X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_SIGNED,DKIM_VALID,
	DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,
	SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no
	version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on morse.vger.email
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (morse.vger.email [0.0.0.0]); Mon, 16 Oct 2023 08:47:41 -0700 (PDT)

I3C allow devices early terminate data transfer. So set "actual" to
indicate how much data get by i3c_priv_xfer.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 drivers/i3c/master/svc-i3c-master.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 3570b709cf60..444825aafa6f 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -138,6 +138,7 @@ struct svc_i3c_cmd {
 	const void *out;
 	unsigned int len;
 	unsigned int actual_len;
+	struct i3c_priv_xfer *xfer;
 	bool continued;
 };
 
@@ -1045,6 +1046,7 @@ static int svc_i3c_master_xfer(struct svc_i3c_master *master,
 
 	if (readl(master->regs + SVC_I3C_MERRWARN) & SVC_I3C_MERRWARN_NACK) {
 		ret = -ENXIO;
+		*actual_len = 0;
 		goto emit_stop;
 	}
 
@@ -1062,6 +1064,7 @@ static int svc_i3c_master_xfer(struct svc_i3c_master *master,
 	 */
 	if (SVC_I3C_MSTATUS_IBIWON(reg)) {
 		ret = -ENXIO;
+		*actual_len = 0;
 		goto emit_stop;
 	}
 
@@ -1157,6 +1160,9 @@ static void svc_i3c_master_start_xfer_locked(struct svc_i3c_master *master)
 					  cmd->addr, cmd->in, cmd->out,
 					  cmd->len, &cmd->actual_len,
 					  cmd->continued);
+		if (cmd->xfer)
+			cmd->xfer->actual = cmd->actual_len;
+
 		if (ret)
 			break;
 	}
@@ -1344,6 +1350,7 @@ static int svc_i3c_master_priv_xfers(struct i3c_dev_desc *dev,
 	for (i = 0; i < nxfers; i++) {
 		struct svc_i3c_cmd *cmd = &xfer->cmds[i];
 
+		cmd->xfer = xfers + i;
 		cmd->addr = master->addrs[data->index];
 		cmd->rnw = xfers[i].rnw;
 		cmd->in = xfers[i].rnw ? xfers[i].data.in : NULL;
-- 
2.34.1