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block/swim: Check drive type

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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>
This commit is contained in:
Finn Thain 2018-04-11 20:50:14 -04:00 committed by Jens Axboe
parent 56a1c5ee54
commit 8a500df63d
1 changed files with 4 additions and 2 deletions
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6
drivers/block/swim.c
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@ -829,10 +829,12 @@ static int swim_floppy_init(struct swim_priv *swd)
/* 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 */