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X-Mailman-Approved-At: Wed, 30 Aug 2023 10:54:02 -0700 X-BeenThere: linux-i3c@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org In i3c_master_bus_init() { ... ret = i3c_master_rstdaa_locked(master, I3C_BROADCAST_ADDR); if (ret && ret != I3C_ERROR_M2) ^^^ // it is enum i3c_error_code ... } In dw-i3c-master.c implementation: dw_i3c_ccc_set() { ... ret = xfer->ret; if (xfer->cmds[0].error == RESPONSE_ERROR_IBA_NACK) ccc->err = I3C_ERROR_M2; dw_i3c_master_free_xfer(xfer); return ret; } Return enum i3c_error_code when error happen in i3c_master_rstdaa_locked(). Fixes: 3a379bbcea0a ("i3c: Add core I3C infrastructure") Signed-off-by: Frank Li --- drivers/i3c/master.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index 08aeb69a78003..00a82f3ab9ac0 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -783,6 +783,9 @@ static int i3c_master_rstdaa_locked(struct i3c_master_controller *master, ret = i3c_master_send_ccc_cmd_locked(master, &cmd); i3c_ccc_cmd_dest_cleanup(&dest); + if (ret) + ret = cmd.err; + return ret; } From patchwork Mon Aug 28 19:25:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Li X-Patchwork-Id: 13370359 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 74E7CC83F17 for ; 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Set i3c_ccc_cmd::err as I3C_ERROR_M2. Return success when no i3c device found at svc_i3c_master_do_daa_locked(). Fixes: dd3c52846d59 ("i3c: master: svc: Add Silvaco I3C master driver") Signed-off-by: Frank Li --- drivers/i3c/master/svc-i3c-master.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c index 770b40e28015e..a5620103acb73 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -789,6 +789,9 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master, */ break; } else if (SVC_I3C_MSTATUS_NACKED(reg)) { + /* No I3C devices attached */ + if (dev_nb == 0) + break; /* * A slave device nacked the address, this is * allowed only once, DAA will be stopped and @@ -1263,11 +1266,17 @@ static int svc_i3c_master_send_ccc_cmd(struct i3c_master_controller *m, { struct svc_i3c_master *master = to_svc_i3c_master(m); bool broadcast = cmd->id < 0x80; + int ret; if (broadcast) - return svc_i3c_master_send_bdcast_ccc_cmd(master, cmd); + ret = svc_i3c_master_send_bdcast_ccc_cmd(master, cmd); else - return svc_i3c_master_send_direct_ccc_cmd(master, cmd); + ret = svc_i3c_master_send_direct_ccc_cmd(master, cmd); + + if (ret) + cmd->err = I3C_ERROR_M2; + + return ret; } static int svc_i3c_master_priv_xfers(struct i3c_dev_desc *dev,