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[0/2] firewire: core: optimization for the quirk of Sony DVMC-DA1

Message ID 20240130100409.30128-1-o-takashi@sakamocchi.jp
Headers
Series firewire: core: optimization for the quirk of Sony DVMC-DA1 |

Message

Takashi Sakamoto Jan. 30, 2024, 10:04 a.m. UTC 
  Hi,

A quirk was reported that Sony DVMC-DA1 has a quirk in its configuration
ROM[1]. It has the legacy layout of configuration ROM[2] with the quirk
that the descriptor leaf entry locates just after the vendor directory
entry in its root directory. It is not the layout in the documentation
since the usual descriptor leaf entry locates just after the vendor
immediate entry. Current implementation of firewire-core fail to pick up
the content of descriptor leaf for vendor name. 

This series of changes is to optimize for the quirk, including a slight
correction of documentation for the relevant kernel API. The changes
are written to be accepted to the release candidates of v6.8 so that
they don't conflict to the changes in for-next branch[3], thus they
do not necessarily have a good look.

[1] https://lore.kernel.org/lkml/20240126011705.GA22564@workstation.local/
[2] Configuration ROM for AV/C Devices 1.0 (1394 Trading Association, Dec
2000, TA Document 1999027)
https://web.archive.org/web/20210216003030/http://1394ta.org/wp-content/uploads/2015/07/1999027.pdf
[3] https://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394.git/log/?h=for-next

Takashi Sakamoto (2):
  firewire: core: correct documentation of fw_csr_string() kernel API
  firewire: core: search descriptor leaf just after vendor directory
    entry in root directory

 drivers/firewire/core-device.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)