lkml.org 
[lkml]   [2024]   [Jan]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[RFC PATCH v4 0/1] fpga: improve protection against low-level control module unloading
Date
This RFC proposes a solution to keep protecting the fpga manager against
the unloading of the low-level control modules while addressing the
limitations of the current implementation. Currently, the code assumes
that the low-level module registers a driver for the parent device that
is later used to take the module's refcount. This proposal removes this
limitation by adding a module owner field to the fpga_manager struct
that can be set while registering the manager.

For more context, please refer to these threads:
https://lore.kernel.org/linux-fpga/ZS6hhlvjUcqyv8zL@yilunxu-OptiPlex-7050
https://lore.kernel.org/linux-fpga/ZT9qENE9fE3Z0KCW@yilunxu-OptiPlex-7050

v4:
- Use helper macros to set the owner module
v3:
- Improved locking
v2:
- Fixed protection against races during module removal

Marco Pagani (1):
fpga: add an owner and use it to take the low-level module's refcount

drivers/fpga/fpga-mgr.c | 93 ++++++++++++++++++++++-------------
include/linux/fpga/fpga-mgr.h | 80 +++++++++++++++++++++++++++---
2 files changed, 134 insertions(+), 39 deletions(-)


base-commit: 610a9b8f49fbcf1100716370d3b5f6f884a2835a
--
2.43.0


\
 
 \ /
  Last update: 2024-01-06 00:25    [W:0.731 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site