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ahci: Make sending the SETFEATURES_XFER command optional

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This command doesn't really do anything when talking to a SATA device, and
sending it confuses some of them. This change makes sending the command
optional, and defaults to not. The situations where it should be sent are not
the common case.

With the standard SSD in the machine, here are some times with the option
turned off:
1. 8277
2. 8273
3. 8050

And turned on:
1. 8303
2. 8155
3. 8276

Sending that command seems to have no meaningful effect on performance.

This fixes problems with an SSD marked Toshiba NV6424, Taiwan 11159AE P
and TC58NVG5D2FTA10.

Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: Taylor Hutt <thutt@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Gabe Black 2012-10-29 05:23:52 +00:00 committed by Tom Rini
parent 4e422bce8a
commit e81058c05b
1 changed files with 6 additions and 0 deletions
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6
drivers/block/ahci.c
View file

@ -373,6 +373,7 @@ static void ahci_fill_cmd_slot(struct ahci_ioports *pp, u32 opts)
}
#ifdef CONFIG_AHCI_SETFEATURES_XFER
static void ahci_set_feature(u8 port)
{
struct ahci_ioports *pp = &(probe_ent->port[port]);
@ -397,6 +398,7 @@ static void ahci_set_feature(u8 port)
printf("set feature error on port %d!\n", port);
}
}
#endif
static int ahci_port_start(u8 port)
@ -743,7 +745,9 @@ void scsi_low_level_init(int busdevfunc)
printf("Can not start port %d\n", i);
continue;
}
#ifdef CONFIG_AHCI_SETFEATURES_XFER
ahci_set_feature((u8) i);
#endif
}
}
}
@ -784,7 +788,9 @@ int ahci_init(u32 base)
printf("Can not start port %d\n", i);
continue;
}
#ifdef CONFIG_AHCI_SETFEATURES_XFER
ahci_set_feature((u8) i);
#endif
}
}
err_out: