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authorTejun Heo <htejun@gmail.com>2006-04-02 17:54:46 +0900
committerJeff Garzik <jeff@garzik.org>2006-04-02 10:02:57 -0400
commit14d2bac1877ed4e2cc940d1680db1a4f29225811 (patch)
tree60b478485e7453dd5a41aea34699a305dd3c8d2c /include/linux/libata.h
parentcf176e1aa92eb2a3faea8409e841396a66413937 (diff)
[PATCH] libata: improve ata_bus_probe()
Improve ata_bus_probe() such that configuration failures are handled better. Each device is given ATA_PROBE_MAX_TRIES chances, but any non-transient error (revalidation failure with -ENODEV, configuration failure with -EINVAL...) disables the device directly. Any IO error results in SATA PHY speed down and ata_set_mode() failure lowers transfer mode. The last try always puts a device into PIO-0. After each failure, the whole port is reset to make sure that the controller and all the devices are in a known and stable state. The reset also applies SATA SPD configuration if necessary. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'include/linux/libata.h')
-rw-r--r--include/linux/libata.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h
index a5207e66ca5..a4a1e6304e7 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -211,6 +211,9 @@ enum {
/* Masks for port functions */
ATA_PORT_PRIMARY = (1 << 0),
ATA_PORT_SECONDARY = (1 << 1),
+
+ /* how hard are we gonna try to probe/recover devices */
+ ATA_PROBE_MAX_TRIES = 3,
};
enum hsm_task_states {