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A few drivers were not following the standard meme of printing out
their driver name and version at module load time; this is fixed
as well.
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The second argument to ata_qc_complete() was being used for two
purposes: communicate the ATA Status register to the completion
function, and indicate an error. On legacy PCI IDE hardware, the latter
is often implicit in the former. On more modern hardware, the driver
often completely emulated a Status register value, passing ATA_ERR as an
indication that something went wrong.
Now that previous code changes have eliminated the need to use drv_stat
arg to communicate the ATA Status register value, we can convert it to a
mask of possible error classes.
This will lead to more flexible error handling in the future.
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We want ->tf_read() to get a complete snapshot of all taskfile
registers, without requiring the callers to manually call
ata_chk_status() and ata_chk_err() themselves.
This also fixes a minor bug in sata_vsc where the lower bits of the
feature register were incorrectly placed in the HOB (high order bits)
portion of struct ata_taskfile.
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Changes mostly from Mark Lord.
- fix bugs in probe-time error handling
- only complete qc if not NULL
- check port-level polling flags
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Enforce access rules where appropriate.
If the compiler is smart enough, this may buy us an optimization or two
as a side effect.
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from me: change from OSL+GPL to GPL (with approval)
from Mark: Gets rid of an unneeded control bit, slightly increasing
throughput.
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