From patchwork Fri Dec 1 18:29:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 749439 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="bqnAI4pb" Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 04654131 for ; Fri, 1 Dec 2023 10:31:32 -0800 (PST) Received: by mail-pf1-x42d.google.com with SMTP id d2e1a72fcca58-6cdce15f0a3so2726070b3a.1 for ; Fri, 01 Dec 2023 10:31:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1701455490; x=1702060290; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=V5Q+AM+DhOXR89Ju18vzTGC3wrGXus7g2e66yEQ6u/o=; b=bqnAI4pbt/2JXEGzsxEb82qCt80IXSahvoeovzNLUMK3RKJ0eZpYZpeeMkPrTFuYHw wkzmYMAFMBigaGHIToD8H1Mzq0zB/CkB/TVRC16pPdJv/mCV8h9Q5OlsfYWx5L71pKKL 4yBrFGesWjwRfQAOW6UCMTq29cHFFT1JMtw7s= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701455490; x=1702060290; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=V5Q+AM+DhOXR89Ju18vzTGC3wrGXus7g2e66yEQ6u/o=; b=S5RiUqMnbcaGcJ6DX8Zc8uFx05bwejwq0jY1ELlAQKjr/EquTDlnk2LHTekyXqygTn lBZAbeLhLZnJGY68BD7Q3nhQLS7f0kUOC0HEewJdAFsl7ySBM/6lCdyFjnJuC/Jm5NLM gCXYX7xidR4WphXSGNDYYRWtg/WxUZE9rv4lC/Kjg1M/3Fqci4Vqm4WdPONUKX4wvFwc +NkMoswBvSjE6vpSOqEVpHczmLKjVwrGU/IIgTxUFR6zesd3NsI0WCoHXAgJu1nwshZI HXuywAn+ACW/A8zKWhNPahE6noGjCbpiEDg9ix1ICvJo4JDV2GM3R+uRnaryxR4RMz9T bqPA== X-Gm-Message-State: AOJu0YxL1figLma56du1UvViENyiOqI2FqDTrq38gJRqW124j+Dxry6P L1Mb+HboaS2oWDceRoVRKg8rLMrMu6T1Xx4phlZza4D6 X-Google-Smtp-Source: AGHT+IHAuOQjIDX2waOHWW3Fi2purVTSJ192L6IErkIR7DpoPp8Bdvp+y5ic6UoUqwLOExUhrlIMsA== X-Received: by 2002:a05:6a00:23c4:b0:6cb:cd66:2102 with SMTP id g4-20020a056a0023c400b006cbcd662102mr35720154pfc.4.1701455490601; Fri, 01 Dec 2023 10:31:30 -0800 (PST) Received: from tictac2.mtv.corp.google.com ([2620:15c:9d:2:11eb:92ac:94e:c791]) by smtp.gmail.com with ESMTPSA id g11-20020a056a00078b00b006cdda10bdafsm3306926pfu.183.2023.12.01.10.31.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Dec 2023 10:31:30 -0800 (PST) From: Douglas Anderson To: linux-usb@vger.kernel.org, Greg Kroah-Hartman , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: Grant Grundler , Hayes Wang , Simon Horman , =?utf-8?q?Bj=C3=B8rn_Mork?= , netdev@vger.kernel.org, Brian Geffon , Alan Stern , Douglas Anderson , Hans de Goede , Heikki Krogerus , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] usb: core: Don't force USB generic_subclass drivers to define probe() Date: Fri, 1 Dec 2023 10:29:50 -0800 Message-ID: <20231201102946.v2.1.I7ea0dd55ee2acdb48b0e6d28c1a704ab2c29206f@changeid> X-Mailer: git-send-email 2.43.0.rc2.451.g8631bc7472-goog In-Reply-To: <20231201183113.343256-1-dianders@chromium.org> References: <20231201183113.343256-1-dianders@chromium.org> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 There's no real reason that subclassed USB drivers _need_ to define probe() since they might want to subclass for some other reason. Make it optional to define probe() if we're a generic_subclass. Signed-off-by: Douglas Anderson Reviewed-by: Grant Grundler --- Changes in v2: - ("Don't force USB generic_subclass drivers to define ...") new for v2. drivers/usb/core/driver.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index f58a0299fb3b..1dc0c0413043 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -290,7 +290,10 @@ static int usb_probe_device(struct device *dev) * specialised device drivers prior to setting the * use_generic_driver bit. */ - error = udriver->probe(udev); + if (udriver->probe) + error = udriver->probe(udev); + else if (!udriver->generic_subclass) + error = -EINVAL; if (error == -ENODEV && udriver != &usb_generic_driver && (udriver->id_table || udriver->match)) { udev->use_generic_driver = 1;