[PATCH v5 0/7] VFIO platform reset module rework

From: Eric Auger
Date: Wed Oct 28 2015 - 09:02:54 EST

This series fixes the current implementation by getting rid of the
usage of __symbol_get which caused a compilation issue with
CONFIG_MODULES disabled. On top of this, the usage of MODULE_ALIAS makes
possible to add a new reset module without being obliged to update the
framework. The new implementation relies on the reset module registering
its reset function to the vfio-platform driver.

The series is available at


Best Regards


v4 -> v5:
- no code change
- only added Arnd's new R-b

v3 -> v4:
- Remove the EXPORT_SYMBOL_GPL(vfio_platform_calxedaxgmac_reset) later
in [6/7], to keep the functionality working all along the series
- Add Arnd R-b (I dared to keep them despite the above change)
- vfio_platform_unregister_reset gets the reset function to do a double
check on the compat and the function pointer too
- __vfio_platform_register_reset turned to 'void'

v2 -> v3:
- use driver_mutex instead of reset_mutex
- style fixes: single mutex_unlock
- use static nodes; vfio_platform_register_reset now is a macro
- vfio_platform_reset_private.h removed since reset_module_(un)register
disappear. No use of symbol_get anymore.
- new patch introducing vfio-platform-base
- reset look-up moved back at vfio-platform probe time
- new patch featuring dev_info/dev_warn

v1 -> v2:
* in vfio_platform_common.c:
- move reset lookup at load time and put reset at release: this is to
prevent a race between the 2 load module loads
- reset_list becomes static
- vfio_platform_register/unregister_reset take a const char * as compat
- fix node link
- remove old combo struct and cleanup proto of vfio_platform_get_reset
- add mutex to protect the reset list
* in calxeda xgmac reset module
- introduce vfio_platform_reset_private.h
- use module_vfio_reset_handler macro
- do not export vfio_platform_calxedaxgmac_reset symbol anymore
- add a pr_info to show the device is reset by vfio reset module

Eric Auger (7):
vfio: platform: introduce vfio-platform-base module
vfio: platform: add capability to register a reset function
vfio: platform: introduce module_vfio_reset_handler macro
vfio: platform: reset: calxedaxgmac: add reset function registration
vfio: platform: add compat in vfio_platform_device
vfio: platform: use list of registered reset function
vfio: platform: add dev_info on device reset

drivers/vfio/platform/Makefile | 6 +-
.../platform/reset/vfio_platform_calxedaxgmac.c | 5 +-
drivers/vfio/platform/vfio_amba.c | 1 +
drivers/vfio/platform/vfio_platform.c | 1 +
drivers/vfio/platform/vfio_platform_common.c | 119 +++++++++++++++------
drivers/vfio/platform/vfio_platform_private.h | 40 ++++++-
6 files changed, 130 insertions(+), 42 deletions(-)


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