Re: [PATCH] Add port multiplier (PMP) support in sata_fsl driver

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Kumar Gala wrote:
From: Ashish Kalra <ashish.kalra@xxxxxxxxxxxxx>

PMP support for sata_fsl driver.

Signed-off-by: Ashish Kalra <ashish.kalra@xxxxxxxxxxxxx>
---
Jeff,

The following commit (4c9bf4e799ce06a7378f1196587084802a414c03):
libata: replace tf_read with qc_fill_rtf for non-SFF drivers

Broke the sata_fsl.c driver in 2.6.26.  I know the following patch fixes
the issue, it clearly also adds port multipler support.  I'm not sure if
you are willing to take that as part of 2.6.26 or not, but the current
2.6.26 driver is broken.

On boot with debug enabled we get something like (w/o this patch):

spurious interrupt!!, CC = 0x1
interrupt status 0x1
xx_scr_read, reg_in = 1
spurious interrupt!!, CC = 0x1
interrupt status 0x1
xx_scr_read, reg_in = 1
spurious interrupt!!, CC = 0x1
interrupt status 0x1
xx_scr_read, reg_in = 1

.. continues for ever.

- k

 drivers/ata/sata_fsl.c |  224 +++++++++++++++++++++++++++++++++++-------------
 1 files changed, 163 insertions(+), 61 deletions(-)


applied


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