From mboxrd@z Thu Jan 1 00:00:00 1970 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 79D99C55822 for ; Tue, 4 Aug 2026 13:38:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=QjyH6tYyFWHAXqhoczsGkLHgNoc8ES9WouQ/IH7gY5Y=; b=cuKeunfc2kvUeH 0hAz9ZyrslG0ePiLnWiU3BFcx2jQP2i3trDyG9VNM9TUQYX+BrEuiXA3VgU0+0LaVfuiGE55VOj7A q63FNloOXp5E25Oc0b2oEYPXVe2fUz2Ok4xopd9QXevRh8Eh5v5Uj2webAoRDdzCjRO++E+KwWeZP Nz1bSP3XhMGo79co+CCJCI1BsvctNMcvJka0S/u464KIP6ZP36SWlZW5SDMbBWN+cEdIz1gaEubJu o1KLFDwlkHBowthfW6a9O8o2qfLdMrNGF8p5QYz0+nW5C0Ar9MsoNQB8isJwZ6yls2jvplYBB64ji cOD6FZXSWwT9OXMA3cIA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wrFM4-00000001wdp-0pMm; Tue, 04 Aug 2026 13:38:52 +0000 Received: from mgamail.intel.com ([198.175.65.17]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wrFM1-00000001wP5-36Yi for linux-i3c@lists.infradead.org; Tue, 04 Aug 2026 13:38:50 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1785850730; x=1817386730; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ZkUaZuL70LekaMXKH0xasjz56ftvkRCLeoG4ImrPSCQ=; b=dLjDznVihU9miDlhvR+xSgIQg0ZEsapYoUq55lECwD9ZN1+DskWszs3X y4l5zr33Cn8HFNlf+ybcjqadNkjSbXTqyxo+Y+FAw2yLXqtdIbasI7poh ovy2qeYZUvhOjVeLWHH6HRvkGOhKdbK98DOlVSydk9ZZ4rLUnhq2n1lw8 zUmePRawsguGyI2iMlww4noX16tdnnz4lvDOL5mnXvWuIy9wqZatTJdUn NCG+fPtqGkeLvhigrhO0SJuA/6j5otSw0jsM2H5XI5DWl9aGJWttgEQ1B hhLOtYBNAqnm5XvtYoQM1csJaBqik0DdmQocrgYiSshYczzGIF0ZUIs54 w==; X-CSE-ConnectionGUID: a9uAj3peR72Tk0NY044yqw== X-CSE-MsgGUID: S/M2fymNTK+p17v9g3lL1w== X-IronPort-AV: E=McAfee;i="6800,10657,11864"; a="86410171" X-IronPort-AV: E=Sophos;i="6.25,204,1779174000"; d="scan'208";a="86410171" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Aug 2026 06:38:50 -0700 X-CSE-ConnectionGUID: 2Xc+d9tmS8mqeONIWEnk1Q== X-CSE-MsgGUID: gVIB+3M+QgimrWrBQyQSIw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,204,1779174000"; d="scan'208";a="263501059" Received: from mkosciow-mobl1.ger.corp.intel.com (HELO ahunter6-desk) ([10.245.245.132]) by fmviesa004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Aug 2026 06:38:47 -0700 From: Adrian Hunter To: alexandre.belloni@bootlin.com Cc: Frank.Li@nxp.com, akhilrajeev@nvidia.com, rafael@kernel.org, linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH V3 11/14] i3c: master: Reject IBI requests from non-IBI-capable devices Date: Tue, 4 Aug 2026 16:38:07 +0300 Message-ID: <20260804133810.184905-12-adrian.hunter@intel.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260804133810.184905-1-adrian.hunter@intel.com> References: <20260804133810.184905-1-adrian.hunter@intel.com> MIME-Version: 1.0 Organization: Intel Finland Oy, Registered Address: c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo, Business Identity Code: 0357606 - 4, Domiciled in Helsinki X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260804_063849_818029_3653EDDD X-CRM114-Status: GOOD ( 10.20 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org i3c_device_request_ibi() does not verify that a device advertises IBI support before attempting to set up IBI handling. Add a check for I3C_BCR_IBI_REQ_CAP and fail with -EOPNOTSUPP when IBI support is not reported by the device. This keeps IBI setup consistent with other IBI-related functionality, such as exposing wakeup capability only for IBI-capable devices. Signed-off-by: Adrian Hunter Reviewed-by: Frank Li --- Changes in V3: Added Frank's Rev-by tag Changes in V2: None drivers/i3c/device.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c index 5e6df6de0283..f1ba363b22a1 100644 --- a/drivers/i3c/device.c +++ b/drivers/i3c/device.c @@ -204,12 +204,14 @@ int i3c_device_request_ibi(struct i3c_device *dev, return ret; i3c_bus_normaluse_lock(dev->bus); - if (dev->desc) { + if (!dev->desc) { + ret = -ENOENT; + } else if (!(dev->desc->info.bcr & I3C_BCR_IBI_REQ_CAP)) { + ret = -EOPNOTSUPP; + } else { mutex_lock(&dev->desc->ibi_lock); ret = i3c_dev_request_ibi_locked(dev->desc, req); mutex_unlock(&dev->desc->ibi_lock); - } else { - ret = -ENOENT; } i3c_bus_normaluse_unlock(dev->bus); -- 2.53.0 -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c