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libata: clean up EH speed down implementation

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Clean up EH speed down implementation.

* is_io boolean variable is replaced eflags.  is_io is ATA_EFLAG_IS_IO.

* Error categories now have names.

* Better comments.

* Reorder 5min and 10min rules in ata_eh_speed_down_verdict()

* Use local variable @link to cache @dev->link in ata_eh_speed_down()

These changes are to improve readability and ease further changes.
This patch doesn't introduce any behavior change.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-11-27 19:28:56 +09:00 • committed by Jeff Garzik
parent 6f1d1e3a03
commit 3884f7b0a8
2 changed files with 74 additions and 45 deletions
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2
include/linux/libata.h
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@ -482,7 +482,7 @@ struct ata_port_stats {
};
struct ata_ering_entry {
int is_io;
unsigned int eflags;
unsigned int err_mask;
u64 timestamp;
};