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[0/2] Untie the host lock entanglement - part 2

Message ID 20241027082519.576869-1-avri.altman@wdc.com (mailing list archive)
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Series Untie the host lock entanglement - part 2 | expand

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Avri Altman Oct. 27, 2024, 8:25 a.m. UTC 
Here is the 2nd part in the sequel, watering down the scsi host lock
usage in the ufs driver. This work is motivated by a comment made by
Bart [1], of the abuse of the scsi host lock in the ufs driver.  Its
Precursor [2] removed the host lock around some of the host register
accesses.

This part replace the scsi host lock by dedicated locks serializing
access to the clock gating and clock scaling members.


[1] https://lore.kernel.org/linux-scsi/0b031b8f-c07c-42ef-af93-7336439d3c37@acm.org/
[2] https://lore.kernel.org/linux-scsi/20241024075033.562562-1-avri.altman@wdc.com/

Avri Altman (2):
  scsi: ufs: core: Introduce a new clock_gating lock
  scsi: ufs: core: Introduce a new clock_scaling lock

 drivers/ufs/core/ufshcd.c | 92 ++++++++++++++++++++-------------------
 include/ufs/ufshcd.h      |  4 ++
 2 files changed, 52 insertions(+), 44 deletions(-)