[PATCH] libata: implement ATA_EHI_SETMODE and ATA_EHI_POST_SETMODE
libata EH used to perform ata_set_mode() iff the EH session performed
reset as indicated by ATA_EHI_DID_RESET. This is incorrect because
->dev_config() called by revalidation is allowed to modify transfer
mode which ata_set_mode() should take care of. This patch implements
the following two flags.
* ATA_EHI_SETMODE: set during EH to schedule ata_set_mode(). Both new
device attachment and revalidation set this flag.
* ATA_EHI_POST_SETMODE: set while the device is revalidated after
ata_set_mode(). Post-setmode revalidation is different from initial
configuaration and EH revalidation in that ->dev_config() is not
allowed tune transfer mode. LLD can use this flag to determine
whether it's allowed to tune transfer mode. Note that POST_SETMODE
->dev_config() is guaranteed to be preceded by non-POST_SETMODE
->dev_config().
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 9494846..0d0ddea 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -284,6 +284,8 @@
ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */
+ ATA_EHI_SETMODE = (1 << 18), /* configure transfer mode */
+ ATA_EHI_POST_SETMODE = (1 << 19), /* revaildating after setmode */
ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,