From patchwork Wed Oct 14 14:52:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 286645 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8A52C4363A for ; Wed, 14 Oct 2020 15:20:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A4AA22227 for ; Wed, 14 Oct 2020 15:20:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="QeBgNwTX"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="UEHrFFxh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389194AbgJNPUI (ORCPT ); Wed, 14 Oct 2020 11:20:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39130 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731806AbgJNPS7 (ORCPT ); Wed, 14 Oct 2020 11:18:59 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 63B5BC0613D2; Wed, 14 Oct 2020 08:18:59 -0700 (PDT) Message-Id: <20201014145728.085077146@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1602688737; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=QjhDGznDGGQ2d/1GfncBm9+kw9614xiY5DXcI3ixa0U=; b=QeBgNwTXRRs1Joh/ZbrHaE+7Qz4cjfB7I+PmVlSrREL2mQWcOQRdX3atxCE6TCY5Yz7wGm KOuRDHWYO7EI23SeOqDdzlSoCCdo2AWypSqCZG2fDMQtRNdzbK/f4GKsDW0PdK0UmsTD6L CWm/oLcd6mKznSXFzuszO991XnerRWhgepPtp4ocZxT6OIz2f5lkcUgdkEvbKEiPQI6i8R HXt8yUD88F5cVnfwF5fuQc01Akdf+b8YvFS4r0VAfc0RI74aonfc2eNLowI99XNAUJ7TEK Vp8fAhGbpnetb+MiVRTX7VhOJNen4IzGUYPBbefwf+OE1wwfY3JV0Ok+qBrZAQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1602688737; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=QjhDGznDGGQ2d/1GfncBm9+kw9614xiY5DXcI3ixa0U=; b=UEHrFFxhvspH/juGyDPhlmb1qh/gt9fCGr8NgBw6+aKuq1yTpkgrPO+kTFBZddydQTq7uG qTpKhZOziSapuODg== Date: Wed, 14 Oct 2020 16:52:24 +0200 From: Thomas Gleixner To: LKML Cc: Peter Zijlstra , "Ahmed S. Darwish" , Sebastian Andrzej Siewior , Felipe Balbi , Greg Kroah-Hartman , linux-arm-kernel@lists.infradead.org, linux-usb@vger.kernel.org, Thomas Winischhofer , Johan Hovold , Mathias Nyman , Valentina Manea , Shuah Khan , Alan Stern , linux-omap@vger.kernel.org, Kukjin Kim , Krzysztof Kozlowski , linux-samsung-soc@vger.kernel.org, Duncan Sands Subject: [patch 09/12] usb: gadget: pxa27x_udc: Replace in_interrupt() usage in comments References: <20201014145215.518912759@linutronix.de> MIME-Version: 1.0 Content-transfer-encoding: 8-bit Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org From: Ahmed S. Darwish The usage of in_interrupt() in drivers is phased out for various reasons. Documenting calling contexts of functions with 'in_interrupt()' or '!in_interrupt()' is imprecise: For a function which might sleep the condition is preemptible task context, which is not what '!in_interrupt()' describes. Replace the context docummentation with plain text and make them match reality. Signed-off-by: Ahmed S. Darwish Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Thomas Gleixner Cc: Felipe Balbi Cc: Greg Kroah-Hartman Cc: linux-arm-kernel@lists.infradead.org Cc: linux-usb@vger.kernel.org --- drivers/usb/gadget/udc/pxa27x_udc.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) --- a/drivers/usb/gadget/udc/pxa27x_udc.c +++ b/drivers/usb/gadget/udc/pxa27x_udc.c @@ -304,7 +304,7 @@ static struct pxa_ep *find_pxa_ep(struct * update_pxa_ep_matches - update pxa_ep cached values in all udc_usb_ep * @udc: pxa udc * - * Context: in_interrupt() + * Context: interrupt handler * * Updates all pxa_ep fields in udc_usb_ep structures, if this field was * previously set up (and is not NULL). The update is necessary is a @@ -859,7 +859,7 @@ static int write_packet(struct pxa_ep *e * @ep: pxa physical endpoint * @req: usb request * - * Context: callable when in_interrupt() + * Context: interrupt handler * * Unload as many packets as possible from the fifo we use for usb OUT * transfers and put them into the request. Caller should have made sure @@ -997,7 +997,7 @@ static int read_ep0_fifo(struct pxa_ep * * @ep: control endpoint * @req: request * - * Context: callable when in_interrupt() + * Context: interrupt handler * * Sends a request (or a part of the request) to the control endpoint (ep0 in). * If the request doesn't fit, the remaining part will be sent from irq. @@ -1036,8 +1036,8 @@ static int write_ep0_fifo(struct pxa_ep * @_req: usb request * @gfp_flags: flags * - * Context: normally called when !in_interrupt, but callable when in_interrupt() - * in the special case of ep0 setup : + * Context: thread context or from the interrupt handler in the + * special case of ep0 setup : * (irq->handle_ep0_ctrl_req->gadget_setup->pxa_ep_queue) * * Returns 0 if succedeed, error otherwise @@ -1512,7 +1512,8 @@ static int should_disable_udc(struct pxa * pxa_udc_pullup - Offer manual D+ pullup control * @_gadget: usb gadget using the control * @is_active: 0 if disconnect, else connect D+ pullup resistor - * Context: !in_interrupt() + * + * Context: task context, might sleep * * Returns 0 if OK, -EOPNOTSUPP if udc driver doesn't handle D+ pullup */ @@ -1560,7 +1561,7 @@ static int pxa_udc_vbus_session(struct u * @_gadget: usb gadget * @mA: current drawn * - * Context: !in_interrupt() + * Context: task context, might sleep * * Called after a configuration was chosen by a USB host, to inform how much * current can be drawn by the device from VBus line. @@ -1886,7 +1887,7 @@ static void handle_ep0_ctrl_req(struct p * @fifo_irq: 1 if triggered by fifo service type irq * @opc_irq: 1 if triggered by output packet complete type irq * - * Context : when in_interrupt() or with ep->lock held + * Context : interrupt handler * * Tries to transfer all pending request data into the endpoint and/or * transfer all pending data in the endpoint into usb requests. @@ -2011,7 +2012,7 @@ static void handle_ep0(struct pxa_udc *u * Tries to transfer all pending request data into the endpoint and/or * transfer all pending data in the endpoint into usb requests. * - * Is always called when in_interrupt() and with ep->lock released. + * Is always called from the interrupt handler. ep->lock must not be held. */ static void handle_ep(struct pxa_ep *ep) {