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DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?q?QCE2BPLZF5JgK8OS2f1biehj2YY1?= =?utf-8?q?m1i3rKlhUlhKxh9zFGf1xqEeoRTKCFDtZDeYu5MDXqpsieKCeuVNt0S6nDZKVaRIr?= =?utf-8?q?982yikrwlpl5rdddIuhyk7vQ97HREuwykJOc2FP4ek4C3qdbSxUPye/qqzZgBTWih?= =?utf-8?q?3HhgJM8MCaExf8u2Fp3IqpHdnEYRLGx0xNK+Ga16WMFGZ/TUcJs2OnEljeasMYae0?= =?utf-8?q?TErIDA4rvHXC0Y9OdKSUMOj5bzhELgH0Q+e4Xg9Qn5yxFILQK0C/hptNQkD8kWH4J?= =?utf-8?q?JjxylWfFVmXxrsYQI6mhp3/oXsxcROuZzPNVUYjXLvMd5zxqvHbKtpn7EgXmHqzJ7?= =?utf-8?q?NUF4fvlxoWfG5LcMjfsrwGwOBucXBHI77FmSgdEYBZdcaqVrK/rZQWpeL7djPo5m3?= =?utf-8?q?g3NbOqeGEAmkLZGEJ8tMx0k2qhAiSf6eInjR3QliF6aAxq/VT/fZDgsuq2N7l/xS8?= =?utf-8?q?erwx6dwl+ijPfgJf1YcOzuKqAO3RsnpmK9/mYfVrlrRookAUzyp8dE3Lx0bcCcE3W?= =?utf-8?q?BPctKY6jWDZ4OVmIQKSaOrnLltszbS5+X80GFkT3Ru0Ws9kXJRAGXoI1n3HWjQjVP?= =?utf-8?q?yG8gvWHvhVr3gGof/kCoF7ly3wwEDVKTGAos7rft1s6EIqb1zpQslMJeYGziJdSYL?= =?utf-8?q?vVbbSSDu9thU6yuuq0/AGco5igdKwaVepM+e+adJYvSw23PBIRvvJNr8Vx6BgwY3B?= =?utf-8?q?z+KtsflrF7vYHoSAfOTw63lAs/PWIpJEN8cOcnX38YOY4fonxRyMA7RUipDncHcZ1?= =?utf-8?q?nmqk5OxeQPJr0IX0sOiaejaFnRNS6dVBaOSmb/u5Qvj086b1SX8F3iABizrO3y9ny?= =?utf-8?q?f6L5rHQJOZTAK86TDLnvJQAcPwyASqXTnxpjAOlZyIfXc+2XbpMn+sYVOFXIsiGKG?= =?utf-8?q?aqg5KRNqgIEKagttW9b9G6GiNK7czg017i/JPtbXV9ErKqU/6uBtul9N/LK2q0lZf?= =?utf-8?q?6YoQ2j2CsjmHdxUm11sySfCx6rYVY34mjADSVWsGZiT3kS3iqxv8RalqRVtVZHGI+?= =?utf-8?q?ztXpD2FBRUohaxCYK0y7Yj132x8RDLuyepGG4JESCasmxSf4Vm6uZSRDnS+WtBiti?= =?utf-8?q?PNIB0TjfeIiNulbRRFi4EwmyAA2QQcHzBMxxh/ESuXbf+Z7Kk/xZ2jdJBS72LUU9z?= =?utf-8?q?LMn3MWsVSBsqoXQ2icHC6TrXBCtYGR/mBM1AxIggjBvAXEV2olMabVQpP8KIxoRlc?= =?utf-8?q?juw+99+v+fVD6DJNEsyriKctsGxNxSb+d/RZ87ETjFQHyK+aglsjs/RejvmOxZgpy?= =?utf-8?q?W6+hyuM1EVUl7yZD9Rdfd9299IS5VsjLc5d7bvtGWQg/GhEs/0s+uUj/dcLXfr0GH?= =?utf-8?q?PkyTUZO0wTVUKtTHB8B96nSUcEdsbATs76EPNHu9RKyrVFNM6gY/4HLpWdS7uwJuD?= =?utf-8?q?d+i9QA6Is2AFpup3K5h9NfSZoiIq603ownYgE8gyuvIY/PJAV4vJzWfXy6GDO+Xgg?= =?utf-8?q?3N+a8PXK6mEwbRVw+vnYVsAz+6YJHNyg5ZpSKUxmt3a+zRMUJBOnjbcecTDIHotFZ?= =?utf-8?q?8Rqk0plJ40DW?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: a6686b44-0440-4b23-d94d-08dbf1f5eeb1 X-MS-Exchange-CrossTenant-AuthSource: AM6PR04MB4838.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Nov 2023 22:44:37.8398 (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: 02zHrarsbY50WRY9tGSu6K1IcsU/y9tsdreY89HtyGwwLAlzO5UFOpJGOwg5pXTGuskEcSi7Wrnv0tQR4nc8eQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR04MB8851 In MIPI I3C Specification: "Ninth Bit of SDR Target Returned (Read) Data as End-of-Data: In I2C, the ninth Data bit from Target to Controller is an ACK by the Controller. By contrast, in I3C this bit allows the Target to end a Read, and allows the Controller to Abort a Read. In SDR terms, the ninth bit of Read data is referred to as the T-Bit (for ‘Transition’)" I3C allow devices early terminate data transfer. So need "actual_len" field to indicate how much get by i3c_priv_xfer. Reviewed-by: Miquel Raynal Signed-off-by: Frank Li --- Notes: change from v4 to v5 - Add Miquel review tag include/linux/i3c/device.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/i3c/device.h b/include/linux/i3c/device.h index 90fa83464f003..ef6217da8253b 100644 --- a/include/linux/i3c/device.h +++ b/include/linux/i3c/device.h @@ -54,6 +54,7 @@ enum i3c_hdr_mode { * struct i3c_priv_xfer - I3C SDR private transfer * @rnw: encodes the transfer direction. true for a read, false for a write * @len: transfer length in bytes of the transfer + * @actual_len: actual length in bytes are transferred by the controller * @data: input/output buffer * @data.in: input buffer. Must point to a DMA-able buffer * @data.out: output buffer. Must point to a DMA-able buffer @@ -62,6 +63,7 @@ enum i3c_hdr_mode { struct i3c_priv_xfer { u8 rnw; u16 len; + u16 actual_len; union { void *in; const void *out;