This patchset tries to fix the following kernel bug: Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=46741 This is fixed by [PATCH 05]. The bug shows IPMI operation region may appear in a device not under the IPMI system interface device's scope, thus it's required to install the ACPI IPMI operation region handler from the root of the ACPI namespace. The original acpi_ipmi implementation includes several issues that break the test process. This patchset also includes a re-design of acpi_ipmi module to make the test possible. [PATCH 01-05] are bug-fix patches that can be applied to the kernels whose version is > 2.6.38. This can be confirmed with: # git tag --contains e92b297c [PATCH 06] is also a bug-fix patch. The drivers/acpi/osl.c part can be back ported to the kernels whose version > 2.6.14. This can be confirmed with: # git tag --contains 4be44fcd The drivers/acpi/acpi_ipmi.c part can be applied on top of [PATCH 01-05]. [PATCH 07] is a tuning patch for acpi_ipmi.c. [PATCH 08-10] are cleanup patches for acpi_ipmi.c. [PATCH 11] is a cleanup patch not for acpi_ipmi.c. [PATCH 12-13] are test patches. [PATCH 12] may be accepted by upstream kernel as a useful facility to test the loading/unloading of the modules. [PATCH 13] should not be merged by any published kernel as it is a driver for a pseudo device with a PnP ID that does not exist in the real machines. This patchset has passed the test around a fake device accessing IPMI operation region fields on an IPMI capable platform. A stress test of module(acpi_ipmi) load/unload has been performed on such platform. No races can be found and the IPMI operation region handler is functioning now. It is not possible to test module(ipmi_si) load/unload as it can't be unloaded due to its' transfer flushing implementation. Lv Zheng (13): ACPI/IPMI: Fix potential response buffer overflow ACPI/IPMI: Fix atomic context requirement of ipmi_msg_handler() ACPI/IPMI: Fix race caused by the unprotected ACPI IPMI transfers ACPI/IPMI: Fix race caused by the unprotected ACPI IPMI user ACPI/IPMI: Fix issue caused by the per-device registration of the IPMI operation region handler ACPI/IPMI: Add reference counting for ACPI operation region handlers ACPI/IPMI: Add reference counting for ACPI IPMI transfers ACPI/IPMI: Cleanup several acpi_ipmi_device members ACPI/IPMI: Cleanup some initialization codes ACPI/IPMI: Cleanup some inclusion codes ACPI/IPMI: Cleanup some Kconfig codes Testing: Add module load/unload test suite ACPI/IPMI: Add IPMI operation region test device driver drivers/acpi/Kconfig | 71 +++- drivers/acpi/Makefile | 1 + drivers/acpi/acpi_ipmi.c | 513 +++++++++++++++---------- drivers/acpi/ipmi_test.c | 254 ++++++++++++ drivers/acpi/osl.c | 224 +++++++++++ include/acpi/acpi_bus.h | 5 + tools/testing/module-unloading/endless_cat.sh | 32 ++ tools/testing/module-unloading/endless_mod.sh | 81 ++++ 8 files changed, 977 insertions(+), 204 deletions(-) create mode 100644 drivers/acpi/ipmi_test.c create mode 100755 tools/testing/module-unloading/endless_cat.sh create mode 100755 tools/testing/module-unloading/endless_mod.sh -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
