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ide-cd: Don't warn on bogus block size unless it actually matters.

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Frans Pop reported that his CDROM drive reports a blocksize of 2352,
and this causes new warnings due to commit
e8e7b9eb11c34ee18bde8b7011af41938d1ad667 ("ide-cd: fix oops when using
growisofs").

What we're trying to do is make sure that "blocklen >> SECTOR_BITS"
is something the block layer won't choke on.

And for Frans' case "2352 >> SECTOR_BITS" is equal to
"2048 >> SECTOR_BITS", and thats "4".

So warning in this case gives no real benefit.

Reported-by: Frans Pop <elendil@planet.nl>
Tested-by: Frans Pop <elendil@planet.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2009-06-23 16:01:06 -07:00
parent ffc36c7610
commit af054ed001
1 changed files with 4 additions and 1 deletions
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5
drivers/ide/ide-cd.c
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@ -876,9 +876,12 @@ static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
return stat;
/*
* Sanity check the given block size
* Sanity check the given block size, in so far as making
* sure the sectors_per_frame we give to the caller won't
* end up being bogus.
*/
blocklen = be32_to_cpu(capbuf.blocklen);
blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
switch (blocklen) {
case 512:
case 1024: