From patchwork Wed Jan 25 00:23:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 13114914 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EA8C1C54EED for ; Wed, 25 Jan 2023 00:26:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=bSG1bMqzGh6omqi4CYBWc/Xmj4kHBMoy9xY0uetXQHA=; b=MKtxLo67KGjD8+ 6EbVMDIGKe3GMe39ylRWHBPvYaLUuDaS30TCVAuEXXnRIPHpOVASQPKlBsSEXy41HzflOwe1q+uxu QSxziuEjIpxLqiOiy4P73oybLa98ROumY/OPrwEr/M+7xk+x4xqPuDue80pWL+uq319vhMkFSHkfR oMJVv2hXN0/GA9ktpGPW7vRj8X0reevSHWhleL4UK1NMuWQ7JZxfXDwBKH8ot5UI7ePEtnhChcGX+ 9liHQ47QtjfcnQjP0PBC2vfNa6zNF/MUSjXvoSiQIVbCL/uIDfZtyXyu3WRB1GAKDDMIxZYVr2um1 3TWnjJw3ZzQLIMF7aFjw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pKTaQ-005gOc-PX; Wed, 25 Jan 2023 00:24:22 +0000 Received: from mail-ej1-x632.google.com ([2a00:1450:4864:20::632]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pKTZX-005gGv-VG for linux-arm-kernel@lists.infradead.org; Wed, 25 Jan 2023 00:23:31 +0000 Received: by mail-ej1-x632.google.com with SMTP id u19so43472275ejm.8 for ; Tue, 24 Jan 2023 16:23:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=dZ27p7zF4T27+K/nN0SUmKAuxZywkQG/U6QyG5d8NyA=; b=QJ/19TCg14yqvOQLmIFg24XehYjzB9j13SdaTs1rKJ83AU1VbzHGuKuUMnia3DaMML LYwAkiPjcpm6NzEf2MRfedGuZXWLPbji4TBfQVe1kb2+bizrSabk+mvVD4ucmqmdHomI sOzZQOyU62Vj1y/SnnJ7ovCeQmu4/ovGgcCLS58UHYkmDqA9IS737Fa8dcPPHHX8FyKU X6ffSN2Y1q2FZbNMIoB5MCFOrEAHXpIJuP732o9D10rrJkvmhIKXIgz+muzpARYPOoYa 4oXKc+9TN6pU4/ulqMYkpcDIyOvjw7ARw0qoWqgw9n9iDD42cWOsF+YLPNx9JYP0EXLl oJsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=dZ27p7zF4T27+K/nN0SUmKAuxZywkQG/U6QyG5d8NyA=; b=6o+Fnv1S8Li9lIWYVklBx1Jk7qwusNKm9qHHvkKoH+UfKDa2fj9XtxUAmef1tU8BsH S41PctxmdPUCowuOYsnjfCGzkMxINRwEwTBTgUzbBLpdXODunE7xBnigKSgWDHsLF998 jr7W+7lnUUIhVERAyCNklX5rcq6vp9Z0EjEALgNWkDmYwGDbEzTQetR97yWedG3vZYyZ P6M4sT/sWFfj7KN5nbgjuDSlB+XsYx/EimlQMIZmnbNmfAe4xlUTZGAuXMTeRFBiC680 zNbjpWRrG6ffqxijiRJKF9ZOU7UL8YEw8fIisMPDa2XAJTFwvJGnTT6eoXZH4Ts6MzJ2 MEFA== X-Gm-Message-State: AFqh2krK3lnCHWN9ogOksv4RJ1YDb7G9U3FZUI8Le/aaRtP9bLQv6XRI smbh5PZG4G62WduPzEbS7ZQLeAL2fMU7ykNf X-Google-Smtp-Source: AMrXdXuPVo13SXKzlv8efr0eXOVX+Rwf2H5jTBFY9jVwKrKrye2EFI7PJBI7aI+BIoZC8hmeQf5ZAg== X-Received: by 2002:a17:906:a3cf:b0:861:3ed5:e029 with SMTP id ca15-20020a170906a3cf00b008613ed5e029mr44674312ejb.49.1674606202741; Tue, 24 Jan 2023 16:23:22 -0800 (PST) Received: from fedora.local (c-05d8225c.014-348-6c756e10.bbcust.telenor.se. [92.34.216.5]) by smtp.gmail.com with ESMTPSA id if10-20020a170906df4a00b00738795e7d9bsm1584606ejc.2.2023.01.24.16.23.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Jan 2023 16:23:22 -0800 (PST) From: Linus Walleij Date: Wed, 25 Jan 2023 01:23:08 +0100 Subject: [PATCH v3 3/6] crypto: stm32/hash: Use existing busy poll function MIME-Version: 1.0 Message-Id: <20221227-ux500-stm32-hash-v3-3-32ee12cd6f06@linaro.org> References: <20221227-ux500-stm32-hash-v3-0-32ee12cd6f06@linaro.org> In-Reply-To: <20221227-ux500-stm32-hash-v3-0-32ee12cd6f06@linaro.org> To: Herbert Xu , "David S. Miller" , Rob Herring , Krzysztof Kozlowski , Maxime Coquelin , Alexandre Torgue , Lionel Debieve Cc: linux-crypto@vger.kernel.org, devicetree@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Linus Walleij , Rob Herring X-Mailer: b4 0.11.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230124_162328_054278_F8DA6EDC X-CRM114-Status: GOOD ( 13.13 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org When exporting state we are waiting indefinitely in the same was as the ordinary stm32_hash_wait_busy() poll-for-completion function but without a timeout, which means we could hang in an eternal loop. Fix this by waiting for completion like the rest of the code. Acked-by: Lionel Debieve Signed-off-by: Linus Walleij --- ChangeLog v2->v3: - No changes ChangeLog v1->v2: - Pick up Lionel's ACK --- drivers/crypto/stm32/stm32-hash.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c index 0473ced7b4ea..cc0a4e413a82 100644 --- a/drivers/crypto/stm32/stm32-hash.c +++ b/drivers/crypto/stm32/stm32-hash.c @@ -960,11 +960,13 @@ static int stm32_hash_export(struct ahash_request *req, void *out) struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx); u32 *preg; unsigned int i; + int ret; pm_runtime_get_sync(hdev->dev); - while ((stm32_hash_read(hdev, HASH_SR) & HASH_SR_BUSY)) - cpu_relax(); + ret = stm32_hash_wait_busy(hdev); + if (ret) + return ret; rctx->hw_context = kmalloc_array(3 + HASH_CSR_REGISTER_NUMBER, sizeof(u32),