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| author | Alan Cox <alan@redhat.com> | 2007-02-17 02:40:20 +0100 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-02-17 02:40:20 +0100 |
| commit | fdb77da4ca68ae17a39d58c9d5c00479a7e124c0 (patch) | |
| tree | 7dbeb5c579c3e067c5f8c6dedef243c2638fcf7f | |
| parent | 39baf8a798926eb675c9360d5822ca86ed92866e (diff) | |
| download | op-kernel-dev-fdb77da4ca68ae17a39d58c9d5c00479a7e124c0.zip op-kernel-dev-fdb77da4ca68ae17a39d58c9d5c00479a7e124c0.tar.gz | |
ide-floppy: Fix unformatted media crash
A ZIP or similar with unformatted media will cause crashes when attempts
are made to read/write it in some cases. This is because bs_factor is
zero and we divide by it causing an oops.
As the size of a non-accessible/non-existant media is really a bit of a
zen question it doesn't matter if non-existant media is 512 bytes per
sector or zero. Setting it to 1 causes us to generate 512 bytes/sector
accesses and error properly.
Based on a fix found lurking in an ancient bugzilla entry since about 2004 (ugghhh)
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| -rw-r--r-- | drivers/ide/ide-floppy.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c index d33717c..07fa37d 100644 --- a/drivers/ide/ide-floppy.c +++ b/drivers/ide/ide-floppy.c @@ -1433,7 +1433,8 @@ static int idefloppy_get_capacity (ide_drive_t *drive) drive->bios_cyl = 0; drive->bios_head = drive->bios_sect = 0; - floppy->blocks = floppy->bs_factor = 0; + floppy->blocks = 0; + floppy->bs_factor = 1; set_capacity(floppy->disk, 0); idefloppy_create_read_capacity_cmd(&pc); |
