From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.codeaurora.org by pdx-caf-mail.web.codeaurora.org (Dovecot) with LMTP id vkAYKaViHlvWVgAAmS7hNA ; Mon, 11 Jun 2018 11:53:53 +0000 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id A5472607A4; Mon, 11 Jun 2018 11:53:53 +0000 (UTC) Authentication-Results: smtp.codeaurora.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="kixDYZHG" X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by smtp.codeaurora.org (Postfix) with ESMTP id 092DC601C3; Mon, 11 Jun 2018 11:53:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 092DC601C3 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933250AbeFKLxi (ORCPT + 21 others); Mon, 11 Jun 2018 07:53:38 -0400 Received: from mail-lf0-f52.google.com ([209.85.215.52]:42396 "EHLO mail-lf0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933004AbeFKLxf (ORCPT ); Mon, 11 Jun 2018 07:53:35 -0400 Received: by mail-lf0-f52.google.com with SMTP id v135-v6so30073563lfa.9; Mon, 11 Jun 2018 04:53:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Suyinsj+2DMcJEI8FsGWk1SnNxmOdY2jzBHLWvXZJ0g=; b=kixDYZHGRg4sczrgAUfqqfQhh+KlON4rmOrbmoIIKV80qRPKTQXjoz6TvYI5tnFqsG BlpShuv5TyvH9jKA4FJNCa/ZdlJiydYF8nDoKo65d1A7/PcDxr0CKIc4+I5WX3tAtweH yWGMR9cYSesKqLnLqZi7Quo2LLfCpfdbAwPR6+F9K5bxJK9FgZqK10eaeK/SuJ6VDSPV DlqL16o8X8Ttw1QGWFqFIXypvzOu4bDpHFAoZKX1IZ/wBMzB8DbMONTZbXQcbE70Z/O2 he2eHZ6TvwRiDoY4xIVoJmFoHM5nUXIWC32CAs+Bm6PPjj+veerffPU3nL3TERz0GaAL lIHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Suyinsj+2DMcJEI8FsGWk1SnNxmOdY2jzBHLWvXZJ0g=; b=hVaQO1GYJpX82iBdtK7lsyj+QUVgNV2a8d8TAoTJNf16rjbE1fvFur/8mIRmvD4vvK qju/yl3uOFRHaCRA98GU7+6ZZYW04QSuReS4K6cO1K5/Y2knKrWnDPCNrjaffq4/iSFk pdqRzKI5IvOdb/rkTdzjOApxOTHiernjD0dV4X2UB15j6quLGEX6ejgXBwvLsIDSG4vr yKJljvVhd7BbIgMlfIRbr57CRB3rAtFwlUNCAYfyyqf88nqf+0q6zPF1GTZeo+4ICR7l XYXA4m6mq1hhTo++1Gmlr6W8ZdUOg9L17mNvflhyTf67M5VAkWoITwe636pMJQi/+4Pr Cjyg== X-Gm-Message-State: APt69E3SimrAgythCkarGt3d0pMCKUczxHyoQ2ToMhmu25uY17747tAe GdsBFGIp3+36sX50VXO3hurJtqcH X-Google-Smtp-Source: ADUXVKIlQ+UVLibl4aCdlTg7mzUa3RzcWb0YM4rQHpesuKMcaffe65GsI+wweP8RgV0g8w4Kii0dYA== X-Received: by 2002:a2e:8257:: with SMTP id j23-v6mr11109487ljh.1.1528718013720; Mon, 11 Jun 2018 04:53:33 -0700 (PDT) Received: from neopili.qtec.com (cpe.xe-3-0-1-778.vbrnqe10.dk.customer.tdc.net. [80.197.57.18]) by smtp.gmail.com with ESMTPSA id h90-v6sm8332849ljf.65.2018.06.11.04.53.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 11 Jun 2018 04:53:32 -0700 (PDT) From: Ricardo Ribalda Delgado To: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Cc: Ricardo Ribalda Delgado , Rob Herring , Johan Hovold , Greg Kroah-Hartman , Jiri Slaby Subject: [PATCH v2 23/24] serdev: get/put controller Date: Mon, 11 Jun 2018 13:52:39 +0200 Message-Id: <20180611115240.32606-24-ricardo.ribalda@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180611115240.32606-1-ricardo.ribalda@gmail.com> References: <20180611115240.32606-1-ricardo.ribalda@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Allow access serdev controllers by other drivers in a safe way. Cc: Rob Herring Cc: Johan Hovold Cc: Greg Kroah-Hartman Cc: Jiri Slaby Signed-off-by: Ricardo Ribalda Delgado --- drivers/tty/serdev/core.c | 23 +++++++++++++++++++++++ include/linux/serdev.h | 2 ++ 2 files changed, 25 insertions(+) diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index 6b24b0a74fbf..06310110104a 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -724,6 +724,29 @@ void serdev_controller_remove(struct serdev_controller *ctrl) } EXPORT_SYMBOL_GPL(serdev_controller_remove); +struct serdev_controller *serdev_get_controller(int nr) +{ + struct serdev_controller *ctrl; + + ctrl = idr_find(&ctrl_idr, nr); + if (!ctrl) + return NULL; + + get_device(&ctrl->dev); + + return ctrl; +} +EXPORT_SYMBOL_GPL(serdev_get_controller); + +void serdev_put_controller(struct serdev_controller *ctrl) +{ + if (!ctrl) + return; + + put_device(&ctrl->dev); +} +EXPORT_SYMBOL_GPL(serdev_put_controller); + /** * serdev_driver_register() - Register client driver with serdev core * @sdrv: client driver to be associated with client-device. diff --git a/include/linux/serdev.h b/include/linux/serdev.h index bf282b3781b9..1ef6e6503650 100644 --- a/include/linux/serdev.h +++ b/include/linux/serdev.h @@ -182,6 +182,8 @@ void serdev_device_remove(struct serdev_device *); struct serdev_controller *serdev_controller_alloc(struct device *, size_t); int serdev_controller_add(struct serdev_controller *); void serdev_controller_remove(struct serdev_controller *); +void serdev_put_controller(struct serdev_controller *ctrl); +struct serdev_controller *serdev_get_controller(int nr); static inline void serdev_controller_write_wakeup(struct serdev_controller *ctrl) { -- 2.17.1