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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8CB0DC3F6B0 for ; Mon, 15 Aug 2022 18:51:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244392AbiHOSvF (ORCPT ); Mon, 15 Aug 2022 14:51:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49896 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244072AbiHOSq3 (ORCPT ); Mon, 15 Aug 2022 14:46:29 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72189402D5; Mon, 15 Aug 2022 11:28:05 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 9D2A2B81081; Mon, 15 Aug 2022 18:28:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E7AE2C433C1; Mon, 15 Aug 2022 18:28:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1660588082; bh=D/y4d5pdZ1Tbn7G1nCT5Caup0UrGiQVHDoH3a+sxbaA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SgB8HwO65xIv9fCjL1CeTAD5QLn9+aapk7iPjNBrB2ifHWrRgsWJKOnIWtWBK454Z Oz07Xr6AU6i1B9Yf4nFIk0ZBllVH9L0OBOC0ThtQb0nHo/gCT/iTqzz4WfmKoVtMW1 s13P04OviMF0jkQvwpqmKrO0/oFzW4Z4zGhKmbr8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ming Qian , Mirela Rabulea , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 5.15 288/779] media: imx-jpeg: Disable slot interrupt when frame done Date: Mon, 15 Aug 2022 19:58:52 +0200 Message-Id: <20220815180349.606620241@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220815180337.130757997@linuxfoundation.org> References: <20220815180337.130757997@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ming Qian [ Upstream commit 22a2bc88c139dc9757bdb1d0a3665ac27edc79a5 ] The interrupt STMBUF_HALF may be triggered after frame done. It may led to system hang if driver try to access the register after power off. Disable the slot interrupt when frame done. Fixes: 2db16c6ed72ce ("media: imx-jpeg: Add V4L2 driver for i.MX8 JPEG Encoder/Decoder") Signed-off-by: Ming Qian Reviewed-by: Mirela Rabulea Tested-by: Mirela Rabulea Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/imx-jpeg/mxc-jpeg-hw.c | 5 +++++ drivers/media/platform/imx-jpeg/mxc-jpeg-hw.h | 1 + drivers/media/platform/imx-jpeg/mxc-jpeg.c | 10 ++-------- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.c b/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.c index 29c604b1b179..718b7b08f93e 100644 --- a/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.c +++ b/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.c @@ -79,6 +79,11 @@ void mxc_jpeg_enable_irq(void __iomem *reg, int slot) writel(0xFFFFFFFF, reg + MXC_SLOT_OFFSET(slot, SLOT_IRQ_EN)); } +void mxc_jpeg_disable_irq(void __iomem *reg, int slot) +{ + writel(0x0, reg + MXC_SLOT_OFFSET(slot, SLOT_IRQ_EN)); +} + void mxc_jpeg_sw_reset(void __iomem *reg) { /* diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.h b/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.h index 12f132a83a23..bf4e1973a066 100644 --- a/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.h +++ b/drivers/media/platform/imx-jpeg/mxc-jpeg-hw.h @@ -125,6 +125,7 @@ u32 mxc_jpeg_get_offset(void __iomem *reg, int slot); void mxc_jpeg_enable_slot(void __iomem *reg, int slot); void mxc_jpeg_set_l_endian(void __iomem *reg, int le); void mxc_jpeg_enable_irq(void __iomem *reg, int slot); +void mxc_jpeg_disable_irq(void __iomem *reg, int slot); int mxc_jpeg_set_input(void __iomem *reg, u32 in_buf, u32 bufsize); int mxc_jpeg_set_output(void __iomem *reg, u16 out_pitch, u32 out_buf, u16 w, u16 h); diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/imx-jpeg/mxc-jpeg.c index da80167cb57d..aeb3704cfff0 100644 --- a/drivers/media/platform/imx-jpeg/mxc-jpeg.c +++ b/drivers/media/platform/imx-jpeg/mxc-jpeg.c @@ -579,15 +579,8 @@ static irqreturn_t mxc_jpeg_dec_irq(int irq, void *priv) dev_dbg(dev, "Irq %d on slot %d.\n", irq, slot); ctx = v4l2_m2m_get_curr_priv(jpeg->m2m_dev); - if (!ctx) { - dev_err(dev, - "Instance released before the end of transaction.\n"); - /* soft reset only resets internal state, not registers */ - mxc_jpeg_sw_reset(reg); - /* clear all interrupts */ - writel(0xFFFFFFFF, reg + MXC_SLOT_OFFSET(slot, SLOT_STATUS)); + if (WARN_ON(!ctx)) goto job_unlock; - } if (slot != ctx->slot) { /* TODO investigate when adding multi-instance support */ @@ -659,6 +652,7 @@ static irqreturn_t mxc_jpeg_dec_irq(int irq, void *priv) buf_state = VB2_BUF_STATE_DONE; buffers_done: + mxc_jpeg_disable_irq(reg, ctx->slot); jpeg->slot_data[slot].used = false; /* unused, but don't free */ mxc_jpeg_check_and_set_last_buffer(ctx, src_buf, dst_buf); v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx); -- 2.35.1