linux-kernel - [PATCH v2 7/8] mmc: block: Enable partition-table scanning for boot partitions

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Message-Id: <20200306021220.22097-8-digetx@gmail.com>
Date:   Fri,  6 Mar 2020 05:12:19 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Jens Axboe <axboe@...nel.dk>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        David Heidelberg <david@...t.cz>,
        Peter Geis <pgwipeout@...il.com>,
        Stephen Warren <swarren@...dotorg.org>,
        Nicolas Chauvet <kwizart@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Billy Laws <blaws05@...il.com>
Cc:     linux-tegra@...r.kernel.org, linux-block@...r.kernel.org,
        Andrey Danin <danindrey@...l.ru>,
        Gilles Grandou <gilles@...ndou.net>,
        Ryan Grachek <ryan@...ted.us>, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 7/8] mmc: block: Enable partition-table scanning for boot partitions

Some NVIDIA Tegra devices store partition table on a boot eMMC partition,
and thus, boot partitions need to be scanned. This patch enables scanning
of the boot MMC partitions. Please note that boot partitions will be
scanned-only, i.e. the scanned boot partitions will be kept hidden.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/mmc/core/block.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 2c2bec114fd6..b834c830e19a 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -2410,9 +2410,12 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
 	md->parent = parent;
 	set_disk_ro(md->disk, md->read_only || default_ro);
 	md->disk->flags = GENHD_FL_EXT_DEVT;
+
 	if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
-		md->disk->flags |= GENHD_FL_NO_PART_SCAN
-				   | GENHD_FL_SUPPRESS_PARTITION_INFO;
+		md->disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
+
+	if (area_type & MMC_BLK_DATA_AREA_RPMB)
+		md->disk->flags |= GENHD_FL_NO_PART_SCAN;
 
 	/*
 	 * As discussed on lkml, GENHD_FL_REMOVABLE should:
-- 
2.25.1