From patchwork Wed Feb 9 18:25:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 12740771 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 0FB09C433EF for ; Wed, 9 Feb 2022 18:37:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239819AbiBIShW (ORCPT ); Wed, 9 Feb 2022 13:37:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54812 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239704AbiBISg5 (ORCPT ); Wed, 9 Feb 2022 13:36:57 -0500 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C04FC05CB8E; Wed, 9 Feb 2022 10:36:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1644431805; x=1675967805; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=v+VXW5fj89kbBLw30Yb+JRBx/zHxa1O7fYiS2MIddBE=; b=Q9hIZ2PjSWEyGiXCROtE2lwn853LbPMf/rTtNrVOwYae+CpBckUyd/L7 /SRyGWwITHmAuBt6UmsRt8/wXkJuuhnphYL3/kTlYIm0h+l2PRB3VprKu FCmG9jhMgVS7agtSVHNTmdsQnhPd7izEdQe5aHtS46XLfCRlXehVoXCNU AIYGbjY6rfDyApoFiB3Ww6NutAws8tv7G1l2Lt/A3P3rjZEywplhOwqvg msVeUDvt9BtbNwxTTCYKCvAZmZ1iP4pqiPMzNnQLk5lzkiE2QpjoQMJFi n9kKFIxQHUqYRe6QW73p+3kroRhOvgGLeHrZi53/3JXeSFwmWdu7JlCTe w==; X-IronPort-AV: E=McAfee;i="6200,9189,10252"; a="229270391" X-IronPort-AV: E=Sophos;i="5.88,356,1635231600"; d="scan'208";a="229270391" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Feb 2022 10:25:13 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,356,1635231600"; d="scan'208";a="629374925" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga002.fm.intel.com with ESMTP; 09 Feb 2022 10:25:11 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 98AC4107; Wed, 9 Feb 2022 20:25:26 +0200 (EET) From: Andy Shevchenko To: Mauro Carvalho Chehab , Andy Shevchenko , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Patrice Chotard , Mauro Carvalho Chehab Subject: [PATCH v1 1/1] media: c8sectpfe: Clean up handling of *_buffer_aligned Date: Wed, 9 Feb 2022 20:25:21 +0200 Message-Id: <20220209182521.55632-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org There are a few cases where code is harder than needed to read. Improve those by: - dropping unnecessary castings (see note below) - use PTR_ALING() to be more explicit on what's going on there - use proper definitions instead of hard coded values Note, dropping castings will allow to perform an additional check that type is not changed from void * to something else, e.g. u64, which may very well break the bitmap APIs. Signed-off-by: Andy Shevchenko Reviewed-by: Alain Volmat --- .../platform/sti/c8sectpfe/c8sectpfe-core.c | 30 +++++++------------ 1 file changed, 11 insertions(+), 19 deletions(-) diff --git a/drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c b/drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c index 7bb1384e4bad..d60908ec9ea7 100644 --- a/drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c +++ b/drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c @@ -107,7 +107,7 @@ static void channel_swdemux_tsklet(struct tasklet_struct *t) size, DMA_FROM_DEVICE); - buf = (u8 *) channel->back_buffer_aligned; + buf = channel->back_buffer_aligned; dev_dbg(fei->dev, "chan=%d channel=%p num_packets = %d, buf = %p, pos = 0x%x\n\trp=0x%lx, wp=0x%lx\n", @@ -176,7 +176,7 @@ static int c8sectpfe_start_feed(struct dvb_demux_feed *dvbdmxfeed) channel = fei->channel_data[stdemux->tsin_index]; - bitmap = (unsigned long *) channel->pid_buffer_aligned; + bitmap = channel->pid_buffer_aligned; /* 8192 is a special PID */ if (dvbdmxfeed->pid == 8192) { @@ -272,7 +272,7 @@ static int c8sectpfe_stop_feed(struct dvb_demux_feed *dvbdmxfeed) channel = fei->channel_data[stdemux->tsin_index]; - bitmap = (unsigned long *) channel->pid_buffer_aligned; + bitmap = channel->pid_buffer_aligned; if (dvbdmxfeed->pid == 8192) { tmp = readl(fei->io + C8SECTPFE_IB_PID_SET(channel->tsin_id)); @@ -333,8 +333,7 @@ static int c8sectpfe_stop_feed(struct dvb_demux_feed *dvbdmxfeed) __func__, __LINE__, stdemux, channel->tsin_id); /* turn off all PIDS in the bitmap */ - memset((void *)channel->pid_buffer_aligned - , 0x00, PID_TABLE_SIZE); + memset(channel->pid_buffer_aligned, 0, PID_TABLE_SIZE); /* manage cache so data is visible to HW */ dma_sync_single_for_device(fei->dev, @@ -458,23 +457,19 @@ static int configure_memdma_and_inputblock(struct c8sectpfei *fei, init_completion(&tsin->idle_completion); - tsin->back_buffer_start = kzalloc(FEI_BUFFER_SIZE + - FEI_ALIGNMENT, GFP_KERNEL); - + tsin->back_buffer_start = kzalloc(FEI_BUFFER_SIZE + FEI_ALIGNMENT, GFP_KERNEL); if (!tsin->back_buffer_start) { ret = -ENOMEM; goto err_unmap; } /* Ensure backbuffer is 32byte aligned */ - tsin->back_buffer_aligned = tsin->back_buffer_start - + FEI_ALIGNMENT; + tsin->back_buffer_aligned = tsin->back_buffer_start + FEI_ALIGNMENT; - tsin->back_buffer_aligned = (void *) - (((uintptr_t) tsin->back_buffer_aligned) & ~0x1F); + tsin->back_buffer_aligned = PTR_ALIGN(tsin->back_buffer_aligned, FEI_ALIGNMENT); tsin->back_buffer_busaddr = dma_map_single(fei->dev, - (void *)tsin->back_buffer_aligned, + tsin->back_buffer_aligned, FEI_BUFFER_SIZE, DMA_BIDIRECTIONAL); @@ -489,8 +484,7 @@ static int configure_memdma_and_inputblock(struct c8sectpfei *fei, * per pid. By powers of deduction we conclude stih407 family * is configured (at SoC design stage) for bit per pid. */ - tsin->pid_buffer_start = kzalloc(2048, GFP_KERNEL); - + tsin->pid_buffer_start = kzalloc(PID_TABLE_SIZE + PID_TABLE_SIZE, GFP_KERNEL); if (!tsin->pid_buffer_start) { ret = -ENOMEM; goto err_unmap; @@ -503,11 +497,9 @@ static int configure_memdma_and_inputblock(struct c8sectpfei *fei, * the register. */ - tsin->pid_buffer_aligned = tsin->pid_buffer_start + - PID_TABLE_SIZE; + tsin->pid_buffer_aligned = tsin->pid_buffer_start + PID_TABLE_SIZE; - tsin->pid_buffer_aligned = (void *) - (((uintptr_t) tsin->pid_buffer_aligned) & ~0x3ff); + tsin->pid_buffer_aligned = PTR_ALIGN(tsin->pid_buffer_aligned, PID_TABLE_SIZE); tsin->pid_buffer_busaddr = dma_map_single(fei->dev, tsin->pid_buffer_aligned,