linux-kernel - possible esata regression in 2.6.35

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Date:	Sat, 21 Aug 2010 20:52:32 +0200
From:	Nicolas Jungers <nicolas@...gers.net>
To:	linux-kernel@...r.kernel.org
Subject: possible esata regression in 2.6.35

My arm box doesn't succeed to use my esata port multiplier (addonics 
sil3726 based).  It was working well with 2.6.34.1 and 2.6.34.4 but not 
with both 2.6.35.2 and 2.6.35.3.  I haven't test other kernels.

The kernels are from http://sheeva.with-linux.com/sheeva/ with for 
example the following config 
http://sheeva.with-linux.com/sheeva/2.6.35.3/sheeva-2.6.35.3.config

The symptoms are in the console a loop on the esata links.  Here is the 
start of it:

ata2: exception Emask 0x10 SAct 0x0 SErr 0x4010000 action 0xe frozen
ata2: edma_err_cause=00000010 pp_flags=00000000, dev connect
ata2: SError: { PHYRdyChg DevExch }
ata2: hard resetting link
ata2: SATA link up 3.0 Gbps (SStatus 123 SControl F300)
ata2.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 ports, feat 0x1/0x9
ata2.00: hard resetting link
ata2.01: hard resetting link
ata2.02: hard resetting link
ata2.03: hard resetting link
ata2.04: hard resetting link
ata2.05: hard resetting link
ata2.00: qc timeout (cmd 0xec)
ata2.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata2.15: hard resetting link
ata2.15: SATA link up 3.0 Gbps (SStatus 123 SControl F300)
ata2.00: hard resetting link
ata2.01: hard resetting link
ata2.02: hard resetting link
ata2.04: hard resetting link
ata2.05: hard resetting link
ata2.00: qc timeout (cmd 0xec)
ata2.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata2.15: hard resetting link
ata2.15: SATA link up 3.0 Gbps (SStatus 123 SControl F300)
ata2.00: hard resetting link
ata2.01: hard resetting link
ata2.02: hard resetting link
ata2.03: hard resetting link
ata2.04: hard resetting link
ata2.05: hard resetting link
ata2.00: qc timeout (cmd 0xec)
ata2.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata2.00: failed to recover link after 3 tries, disabling
ata2.15: hard resetting link
ata2.15: SATA link up 3.0 Gbps (SStatus 123 SControl F300)

N.
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