ata: ahci_brcm: Avoid clobbering SATA_TOP_CTRL_BUS_CTRL

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We are doing a blind write to SATA_TOP_CTRL_BUS_CTRL to set the system
endian, but in doing so, we are also overwriting other bits, such as the
SATA_SCB_BURST_SIZE and SATA_FIFO_SIZE bits, which impact performance.
Do a read/modify/write so we keep the default values.

While we are at it, we also greatly simplify the logic and just leave
the NSP specific bit settings, instead of having a completely different
sequence.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

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Florian Fainelli 2017-12-22 11:43:08 -08:00 • committed by Tejun Heo

parent ebb82e3c79

commit 36fffd6a1f

1 changed files with 15 additions and 10 deletions

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drivers/ata/ahci_brcm.c

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