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| author |   Mark Lord <liml@rtr.ca> | 2007-04-02 16:20:35 -0400 |
|---|---|---|
| committer |   Jeff Garzik <jeff@garzik.org> | 2007-04-04 02:07:28 -0400 |
| commit | 4742d54fa4b391342dfb8f34de14d51da101fb39 (patch) | |
| tree | 9ef6337a6345349132af7bf8f8bbb3f4415de3de /drivers/ata | |
| parent | Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 (diff) | |
| download | linux-dev-4742d54fa4b391342dfb8f34de14d51da101fb39.tar.xz linux-dev-4742d54fa4b391342dfb8f34de14d51da101fb39.zip | |
2.6.21 fix lba48 bug in libata fill_result_tf()
Current 2.6.21 libata does the following:
void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
{
struct ata_ioports *ioaddr = &ap->ioaddr;
tf->command = ata_check_status(ap);
...
if (tf->flags & ATA_TFLAG_LBA48) {
iowrite8(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
tf->hob_feature = ioread8(ioaddr->error_addr);
...
}
}
...
static void fill_result_tf(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
ap->ops->tf_read(ap, &qc->result_tf);
qc->result_tf.flags = qc->tf.flags;
}
Based on this, those last two statements fill_result_tf()
appear to me to be in the wrong order, in that the tf->flags
are uninitialized at the point where tf_read() is invoked.
So for lba48 commands, tf_read() won't be reading back the
full lba48 register contents..
Correct?
This patch corrects fill_result_tf() so that the flags
get copied to result_tf before they are used by tf_read().
Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/libata-core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index ddb3909d7288..e07142b4bb54 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4717,8 +4717,8 @@ static void fill_result_tf(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; - ap->ops->tf_read(ap, &qc->result_tf); qc->result_tf.flags = qc->tf.flags; + ap->ops->tf_read(ap, &qc->result_tf); } /** |