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.
Signed-off-by: Alan Cox <[EMAIL PROTECTED]>
Based on a fix found lurking in an ancient bugzilla entry since about 2004
(ugghhh)
diff -u --new-file --recursive --exclude-from /usr/src/exclude
linux.vanilla-2.6.20-rc6-mm3/drivers/ide/ide-floppy.c
linux-2.6.20-rc6-mm3/drivers/ide/ide-floppy.c
--- linux.vanilla-2.6.20-rc6-mm3/drivers/ide/ide-floppy.c 2007-01-31
14:20:40.000000000 +0000
+++ linux-2.6.20-rc6-mm3/drivers/ide/ide-floppy.c 2007-01-31
14:33:42.000000000 +0000
@@ -1434,7 +1434,8 @@
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);
-
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