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libata: Add the AHCI_HFLAG_NO_WRITE_TO_RO flag
authorDoug Berger <opendmb@gmail.com>
Wed, 21 Jun 2017 23:20:13 +0000 (16:20 -0700)
committerTejun Heo <tj@kernel.org>
Thu, 22 Jun 2017 20:12:59 +0000 (16:12 -0400)
commit7fab72f85d862572ed3281860dc550b7e737ac52
treed45443b96ebe96e3b633b822cae8acb02be9e77atree | snapshot
parentef0da1bf767d9e557c6375c7066717eead54cb15commit | diff
libata: Add the AHCI_HFLAG_NO_WRITE_TO_RO flag

While most hardware will simply ignore a write to a read-only register,
some hardware will signal an abort if this occurs.

This commit introduces the flag AHCI_HFLAG_NO_WRITE_TO_RO to prevent the
AHCI library from attempting to write to the HOST_CAP, HOST_CAP2, and
HOST_PORTS_IMPL registers which may be read-only.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
drivers/ata/ahci.h diff | blob | history
drivers/ata/libahci.c diff | blob | history
Domain: System / Kernel;