Tejun Heo wrote:
This patch implements libata.force module parameter which can
selectively override ATA port, link and device configurations
including cable type, SATA PHY SPD limit, transfer mode and NCQ.
For example, you can say "use 1.5Gbps for all fan-out ports attached
to the second port but allow 3.0Gbps for the PMP device itself, oh,
the device attached to the third fan-out port chokes on NCQ and
shouldn't go over UDMA4" by the following.
libata.force=2:1.5g,2.15:3.0g,2.03:noncq,udma4
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
I guess it's about time we add something like this. More than
anything else this should help debugging and can serve as a last
resort to work around problems.
Thanks.
Documentation/kernel-parameters.txt | 35 +++
drivers/ata/libata-core.c | 375 +++++++++++++++++++++++++++++++++++-
drivers/ata/libata-eh.c | 8
drivers/ata/libata.h | 1
4 files changed, 415 insertions(+), 4 deletions(-)
ACK, but it breaks the build due to section type conflicts:
drivers/ata/libata-core.c:108: error: ata_force_param_buf causes a
section type conflict
Given that the data is marked __initdata and the code is marked __init,
I cannot see the problem.
-
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
