Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E3B5B21892
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Laurent Vivier <lvivier@redhat.com>,
        Jens Axboe <axboe@kernel.dk>, Stan Johnson <userm57@yahoo.com>,
        Finn Thain <fthain@telegraphics.com.au>
Subject: [PATCH 4.14 69/80] block/swim: Check drive type
Date:   Fri, 27 Apr 2018 15:59:02 +0200
Message-Id: <20180427135736.453851864@linuxfoundation.org>
In-Reply-To: <20180427135732.928644313@linuxfoundation.org>
References: <20180427135732.928644313@linuxfoundation.org>
User-Agent: quilt/0.65
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Finn Thain <fthain@telegraphics.com.au>

commit 8a500df63d07d8aee44b7ee2c54e462e47ce93ec upstream.

The SWIM chip is compatible with GCR-mode Sony 400K/800K drives but
this driver only supports MFM mode. Therefore only Sony FDHD drives
are supported. Skip incompatible drives.

Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: stable@vger.kernel.org # v4.14+
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/block/swim.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -834,10 +834,12 @@ static int swim_floppy_init(struct swim_
 	/* scan floppy drives */
 
 	swim_drive(base, INTERNAL_DRIVE);
-	if (swim_readbit(base, DRIVE_PRESENT))
+	if (swim_readbit(base, DRIVE_PRESENT) &&
+	    !swim_readbit(base, ONEMEG_DRIVE))
 		swim_add_floppy(swd, INTERNAL_DRIVE);
 	swim_drive(base, EXTERNAL_DRIVE);
-	if (swim_readbit(base, DRIVE_PRESENT))
+	if (swim_readbit(base, DRIVE_PRESENT) &&
+	    !swim_readbit(base, ONEMEG_DRIVE))
 		swim_add_floppy(swd, EXTERNAL_DRIVE);
 
 	/* register floppy drives */