[Bug 215788] arcmsr driver on kernel 5.16 and up fails to initialize ARC-1280ML RAID controller

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215788

--- Comment #3 from Jernej Simončič (jernej-bugzilla.kernel@ena.si) ---
Done, it points at this commit:

e815d36548f01797ce381be8f0b74f4ba9befd15 is the first bad commit
commit e815d36548f01797ce381be8f0b74f4ba9befd15
Author: Damien Le Moal <damien.lemoal@wdc.com>
Date:   Wed Oct 27 11:22:20 2021 +0900

    scsi: sd: add concurrent positioning ranges support

    Add the sd_read_cpr() function to the sd scsi disk driver to discover
    if a device has multiple concurrent positioning ranges (i.e. multiple
    actuators on an HDD). The existence of VPD page B9h indicates if a
    device has multiple concurrent positioning ranges. The page content
    describes each range supported by the device.

    sd_read_cpr() is called from sd_revalidate_disk() and uses the block
    layer functions disk_alloc_independent_access_ranges() and
    disk_set_independent_access_ranges() to represent the set of actuators
    of the device as independent access ranges.

    The format of the Concurrent Positioning Ranges VPD page B9h is defined
    in section 6.6.6 of SBC-5.

    Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
    Reviewed-by: Hannes Reinecke <hare@suse.de>
    Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
    Reviewed-by: Keith Busch <kbusch@kernel.org>
    Link:
https://lore.kernel.org/r/20211027022223.183838-3-damien.lemoal@wdc.com
    Signed-off-by: Jens Axboe <axboe@kernel.dk>

 drivers/scsi/sd.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 drivers/scsi/sd.h |  1 +
 2 files changed, 82 insertions(+)

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