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libata: Avoid overflow in ata_tf_read_block() when tf->hba_lbal > 127 

Phillip O'Donnell <phillip.odonnell@gmail.com> pointed out that the same
sign extension bug that was fixed in commit ba14a9c2 ("libata: Avoid
overflow in ata_tf_to_lba48() when tf->hba_lbal > 127") also appears to
exist in ata_tf_read_block().  Fix this by adding a cast to u64.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Roland Dreier 2008-11-04 10:34:48 -08:00 committed by Jeff Garzik
parent a12d6c9a09
commit 44901a9684
1 changed files with 1 additions and 1 deletions
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2
drivers/ata/libata-core.c
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@ -612,7 +612,7 @@ u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
if (tf->flags & ATA_TFLAG_LBA48) { if (tf->flags & ATA_TFLAG_LBA48) {
block |= (u64)tf->hob_lbah << 40; block |= (u64)tf->hob_lbah << 40;
block |= (u64)tf->hob_lbam << 32; block |= (u64)tf->hob_lbam << 32;
block |= tf->hob_lbal << 24; block |= (u64)tf->hob_lbal << 24;
} else } else
block |= (tf->device & 0xf) << 24; block |= (tf->device & 0xf) << 24;