From patchwork Sun Mar 13 02:45:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tim Blechmann X-Patchwork-Id: 12779012 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17BB3C433EF for ; Sun, 13 Mar 2022 02:46:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233385AbiCMCrH (ORCPT ); Sat, 12 Mar 2022 21:47:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55684 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232810AbiCMCrF (ORCPT ); Sat, 12 Mar 2022 21:47:05 -0500 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC029100768 for ; Sat, 12 Mar 2022 18:45:57 -0800 (PST) Received: by mail-pj1-x1029.google.com with SMTP id cx5so11493991pjb.1 for ; Sat, 12 Mar 2022 18:45:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=v9ynjd7oEnonByMr2gLfZybzQggHULZvnP/5MBiCxLA=; b=pm3J9UBltGcItHnGW1QzmD401cX/KeMqgRjjbMmoWYurnSL2INTROZe1TRGQcYbIy3 cCSYafN76p+rdxcSQyIM/wkEXll5fThQk3ajiEF8HiWyJJzqhmg+iOI0eng0p2MpOVuB xQbWkMn3Lvv4elr3TMm9/B9oqVYZs5GP12qJIHIyhivll4seIN7LpOEOJJJpjNDpN3RF OajhRpZQ7PTHzC+myL8B7dfqxLBJYOzR+EQZCiCtAD1R0CDH3yAE2BDwngdElaXLGvRv tWCdKfOu721mvlY3G4PRqkPQBdjknVcIg5t3hr/QK5zeP0Hcs0vQKOlYzOi6mAhBuD1y 0sSg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=v9ynjd7oEnonByMr2gLfZybzQggHULZvnP/5MBiCxLA=; b=109saec7Hge1VhuvDkcvuhnRKJVqh5Wq0vf1+iN46fWkaTw/3s9lvZPcub9TTuADlm nsFanBIEh41CbWuuZu7ad/HUlclTplbJdvCsXdltzGdulbBXPt7RCpPlRZt4fRcrZbkm 0d3q6C5vT+Xqezfo4VIJ+oBdu0pgHy/OtUh7rg+xldveXbZemUR14vpfVj3xeeiNtj8r JFmGCqXZ9B/FpyKhqu+DJK1UMptl9UUpCAxTVFFpXeuLUu9ldeUuNNJ13qo/H31csTPp 6Jgxs/AJlfTtg61bHMalqGAC1xha9fpkwLyjjpYUkns3VGZh0uNi3gy6kdzAGyqdvMc8 8IRQ== X-Gm-Message-State: AOAM533pnsiZrncw7JzW6lP80Xt4p7JS1aHvzXuzK1aUo+Yz8p9t9mnD vZt54xl2MffQ3rOHhXxKWzU= X-Google-Smtp-Source: ABdhPJyi3pvG0RslA7HBbJAZVCuxjzctqOO624MynZk4dUtSrRRNEwTfUx8ecghosbVZscVBIGF6AA== X-Received: by 2002:a17:902:ea0d:b0:151:df90:779f with SMTP id s13-20020a170902ea0d00b00151df90779fmr18095264plg.1.1647139557265; Sat, 12 Mar 2022 18:45:57 -0800 (PST) Received: from localhost.localdomain ([2001:f40:906:26d6:1e16:d3e6:5bef:9507]) by smtp.googlemail.com with ESMTPSA id k4-20020a17090a910400b001bd171c7fd4sm16499924pjo.25.2022.03.12.18.45.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 12 Mar 2022 18:45:56 -0800 (PST) From: tim.blechmann@gmail.com X-Google-Original-From: tim@klingt.org To: Bjorn Andersson Cc: linux-remoteproc@vger.kernel.org, Tim Blechmann Subject: [PATCH 0/1 v2] rpmsg: char - treat `ENOMEM` as `EAGAIN` Date: Sun, 13 Mar 2022 10:45:40 +0800 Message-Id: <20220313024541.1579848-1-tim@klingt.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org From: Tim Blechmann This patch should allow the use of `rpmsg_char` character devices with libraries that do a `poll`/`write` loop and expect `EAGAIN` when sending fails and the user space application needs to `poll` to wait for more space to be available. `boost::asio::write` is a notable example of a library, which implements such a loop. Tim Blechmann (1): rpmsg: char - treat `ENOMEM` as `EAGAIN` drivers/rpmsg/rpmsg_char.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)