From patchwork Mon Apr 13 12:07:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 11485487 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7C08A1392 for ; Mon, 13 Apr 2020 12:14:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 64B6620753 for ; Mon, 13 Apr 2020 12:14:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="uRy1s7EG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728268AbgDMMOt (ORCPT ); Mon, 13 Apr 2020 08:14:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51924 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1728256AbgDMMOn (ORCPT ); Mon, 13 Apr 2020 08:14:43 -0400 Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1AE0CC03BC82 for ; Mon, 13 Apr 2020 05:08:05 -0700 (PDT) Received: by mail-pg1-x544.google.com with SMTP id c5so4360129pgi.7 for ; Mon, 13 Apr 2020 05:08:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id; bh=BIBvMgUnvDgGZghMH04dMf9slrG7wjbl7QR/9HSXTJo=; b=uRy1s7EGEp8BkdEjZAQpmQo3cCodNSSvRaev6POOo+mew8bO4EAHrfOWQQCMqUIfiY tZZomzvqBubP3hpBJx91Tdt7UlfEGizPkNnPi08th3i0O5OFPQatYf26n4Im3rKwpkGr t8/MUJBK0cfSnwBxkBatfcLTOPDR+jrAR6UBZoq/c451VLHjzEDrv1ro4Qx2+27AVnC6 2m8eIMS2J6shbLRpbcoIJFgG9Uk45VJDxRJwVk5uPLlVljS1M1Jvq0Qm/tKVOhqhaztq XwxsXZ08txZzy1uLTHGR0LTpgNi2Sf2ehPE3WQf8OYlML6Xo6KslCbYr0XiTty5KaEAA 5PDw== 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; bh=BIBvMgUnvDgGZghMH04dMf9slrG7wjbl7QR/9HSXTJo=; b=hgSzMEItyx10c64G/yYIwNMGbXbRs3Xv4okZS31ZMKY+VsfC0oOne/gLQARVaNoVq3 3eVp244ghnmahdc4Jlp1wmLRcodj+yc1k9f5w8LrNpbaWyLvESGfnQ1oz3VrGZzjKHl0 6bsP22jgpRI1PZ+dlroGLWo1oS5SR8elM6up8RMB1a2OeRq9aM13I1n39p5Cf9EDTb/d 77h5goElJNUFW/yYNjtrTSgah5UAeHb3EgEyE9HWHRi9CWYAZrMV51wyzPNwkqrPJCHi vBPkOpWkof5NTGyp8a0RyJnB/3RPgiSu1VUSbr1Zb0R2vFqgMdf2MOnFf/tcjfCI/GQ1 8Zwg== X-Gm-Message-State: AGi0PuYAN74WV+aZF/jk5v2bixT5fhB8xOkyGfYe25PrbzjfVk7MfkZw 5QMP8RXxbQDmU1vmic91IIQriZtwyA== X-Google-Smtp-Source: APiQypLIoeYk9G74CAvG8xdvpdDVlfoDimcpFm6oRfnwQBcwTRX6j+ysTHd1tHSRhBTGCvlmc+VtHw== X-Received: by 2002:a63:2cd5:: with SMTP id s204mr16420791pgs.71.1586779684515; Mon, 13 Apr 2020 05:08:04 -0700 (PDT) Received: from localhost.localdomain ([2409:4072:621d:5eab:c98c:e94e:e075:c316]) by smtp.gmail.com with ESMTPSA id i187sm8493136pfg.33.2020.04.13.05.08.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Apr 2020 05:08:03 -0700 (PDT) From: Manivannan Sadhasivam To: hemantk@codeaurora.org, jhugo@codeaurora.org Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, smohanad@codeaurora.org, dan.carpenter@oracle.com, Manivannan Sadhasivam Subject: [PATCH 1/2] bus: mhi: core: Fix parsing of mhi_flags Date: Mon, 13 Apr 2020 17:37:40 +0530 Message-Id: <20200413120741.2832-1-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.17.1 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org With the current parsing of mhi_flags, the following statement always return false: eob = !!(flags & MHI_EOB); This is due to the fact that 'enum mhi_flags' starts with index 0 and we are using direct AND operation to extract each bit. Fix this by using BIT() macro to extract each bit and make the mhi_flags index start from 1. Fixes: 189ff97cca53 ("bus: mhi: core: Add support for data transfer") Reported-by: Dan Carpenter Signed-off-by: Manivannan Sadhasivam --- drivers/bus/mhi/core/main.c | 6 +++--- include/linux/mhi.h | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index eb4256b81406..4165a853c189 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -1090,9 +1090,9 @@ int mhi_gen_tre(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan, if (ret) return ret; - eob = !!(flags & MHI_EOB); - eot = !!(flags & MHI_EOT); - chain = !!(flags & MHI_CHAIN); + eob = !!(flags & BIT(0)); + eot = !!(flags & BIT(1)); + chain = !!(flags & BIT(2)); bei = !!(mhi_chan->intmod); mhi_tre = tre_ring->wp; diff --git a/include/linux/mhi.h b/include/linux/mhi.h index ad1996001965..22185fecbbf2 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -53,7 +53,7 @@ enum mhi_callback { * @MHI_CHAIN: Linked transfer */ enum mhi_flags { - MHI_EOB, + MHI_EOB = 1, MHI_EOT, MHI_CHAIN, };