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 phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4E619C433F5 for ; Mon, 25 Apr 2022 18:28:19 +0000 (UTC) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 60CEB8053F; Mon, 25 Apr 2022 20:28:17 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=denx.de Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1650911297; bh=ITueypEqnqwxnD1FPFnFlY+XTCt0hkCTwNwskN6Vi70=; h=From:To:Cc:Subject:Date:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From; b=z9UsAz0I4fUl7Ya65KsbXLDgDGxfx3kRQgUWjEsHAIgdoyIxEZdL4HOtFDDQ67h2A xNOcgWZCzsI3hLY0gSC5XXYFv68fSKJL12hMFgeQoFH41LYfnYJM/wdi9KQHhlUy1Q XiEF0wzX8Nr1i4p/zvo0+x7p8vAgBKE3HPOyPCzozeS62ItAgz3l2NXpNrEVI6aREp gOw0E7gANAiL7QXD9w27RzxrAO5KyzWo61JupkeDRAWfq4a1fHLhSJUVWVmRtfh4X2 hakM5MqCnkFAtimuhqXOYgqDAGC8zqqUF3nRjusfaCbufhJv2rxUUytABLw0d8U8wL 0I+1Q1qKvOCtg== Received: from tr.lan (ip-86-49-12-201.net.upcbroadband.cz [86.49.12.201]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: marex@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 1333A8013A; Mon, 25 Apr 2022 20:28:15 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1650911295; bh=ITueypEqnqwxnD1FPFnFlY+XTCt0hkCTwNwskN6Vi70=; h=From:To:Cc:Subject:Date:From; b=BOwjZa+6zs6gpRnrDDao7N9XD6DQXMznsVkGiZlEoH1clgC8Kgvo1ErLCeGcWwa2a Yl4C6O+Lw/Wd0jVVTck1i4XYc2XzBDvREty1yZ69k+7bdKLz4Y4fyVBjZzB0rTURvs BVtNt0c5vUo6gYJCauiMR6lCp7SNZY18pnaIi2RJOk4rU+gbM2eJluPhJFxw1uc8rK 4KqzTs8sLPj5sT0wD9kjYeJ6AT5qu6IeOqDgdqLXxzEPKGwJKiQlrPFXn4xUccHJjU L18MxmrFy0U4J8grVRphaG4Y6R+QDBR7uul8MWPdr6el29ITkMQTWJv0ssepdfn+Gm iYZ7ZoBuOTg8w== From: Marek Vasut To: u-boot@lists.denx.de Cc: Marek Vasut , Joe Hershberger , Ramon Fried Subject: [PATCH] net: dm9000: Correctly handle empty FIFO Date: Mon, 25 Apr 2022 20:28:05 +0200 Message-Id: <20220425182805.247389-1-marex@denx.de> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.5 at phobos.denx.de X-Virus-Status: Clean Assign packet pointer only in case the MAC reports anything in the FIFO. In case the MAC indicates empty FIFO, return 0 to pass that information to the network stack. Signed-off-by: Marek Vasut Cc: Joe Hershberger Cc: Ramon Fried --- drivers/net/dm9000x.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/dm9000x.c b/drivers/net/dm9000x.c index 78ce536d4a3..07733df533e 100644 --- a/drivers/net/dm9000x.c +++ b/drivers/net/dm9000x.c @@ -666,10 +666,10 @@ static int dm9000_recv(struct udevice *dev, int flags, uchar **packetp) int ret; ret = dm9000_recv_common(db, data); - if (ret) + if (ret > 0) *packetp = (void *)data; - return ret ? ret : -EAGAIN; + return ret >= 0 ? ret : -EAGAIN; } static int dm9000_write_hwaddr(struct udevice *dev) -- 2.35.1