This patchset tries to fix the following kernel bug: Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=46741 This is fixed by [PATCH 06]. 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 01-06] 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 07] is a tuning patch for acpi_ipmi.c. [PATCH 08-12] are cleanup patches for acpi_ipmi.c and its Kconfig item. v2.0 PATCH 03: Uses timeout mechanism offerred by ipmi_si. PATCH 05: Uses kref instead of atomic_t and adds "dead" flag to kill the atomic_read codes in ipmi_flush_tx_msg(). PATCH 07: Uses kref instead of atomic_t. 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 (12): ACPI/IPMI: Fix atomic context requirement of ipmi_msg_handler() ACPI/IPMI: Fix potential response buffer overflow ACPI/IPMI: Fix race caused by the unprotected ACPI IPMI transfers ACPI/IPMI: Fix race caused by the timed out 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 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 ACPI/IPMI: Cleanup coding styles drivers/acpi/Kconfig | 3 +- drivers/acpi/acpi_ipmi.c | 594 ++++++++++++++++++++++++++++------------------ 2 files changed, 367 insertions(+), 230 deletions(-) -- 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
