[v3] Untie the host lock entanglement - part 2

[PATCH v3 0/2] Untie the host lock entanglement - part 2

Avri Altman posted 2 patches 2 weeks, 4 days ago

Diff against v1 v2 v4 v5
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There is a newer version of this series

drivers/ufs/core/ufshcd.c | 219 +++++++++++++++++---------------------
include/ufs/ufshcd.h      |  24 +++--
2 files changed, 111 insertions(+), 132 deletions(-)

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[PATCH v3 0/2] Untie the host lock entanglement - part 2

Posted by Avri Altman 2 weeks, 4 days ago

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

Changes compared to v2:
 - Use clang-format to fix formating (Bart)
 - Use guard() in ufshcd_clkgate_enable_store (Bart)
 - Elaborate commit log (Bart)

Changes compared to v1:
 - use the guard() & scoped_guard() macros (Bart)
 - re-order struct ufs_clk_scaling and struct ufs_clk_gating (Bart)

[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 | 219 +++++++++++++++++---------------------
 include/ufs/ufshcd.h      |  24 +++--
 2 files changed, 111 insertions(+), 132 deletions(-)

-- 
2.25.1