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David Alan Gilbert" Date: Mon, 28 Jan 2019 11:54:39 -0600 Message-Id: <20190128175458.27255-1-minyard@acm.org> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::d29 Subject: [Qemu-devel] [PATCH v4 00/19] Fix/add vmstate handling in some I2C code X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Paolo Bonzini , Corey Minyard , "Michael S . Tsirkin" Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" I've forced some time open to work on this, it's been too long. Changes since v3: Change I2C to "I2C and SMBus" in the MAINTAINERS file. Added a comment to the smbus_eeprom reset to make the reasoning for the choice clear. Fix a logic error introduced in "i2c: Don't check return value from i2c_recv()". Fix a debug problem in "i2c: Simplify and correct the SMBus state machine", a removed variable was still being used in a debug statement. Split up "i2c: Simplify and correct the SMBus state machine" into smaller logical chunks. Updated "boards.h: Ignore migration for SMBus devices on older machines" to ignore migration for 4.0 and earlier. No other comments received on "i2c:smbus_eeprom: Add vmstate handling to the smbus eeprom", not sure what to make of that. I think that Dave's response to my question was that it could be modified to support different sizes in the future without issue. Dropped "hw/i2c/smbus_eeprom: Create at most SMBUS_EEPROM_MAX EEPROMs on a SMBus and instead added a patch to assert if the number of eeproms is > 8. Changes since v2: Added proper license headers for the newly created files. Removed unneeded code in several places pointed out by Peter Maydell since i2c_recv() returns a uint8_t instead of an int. These are in two separate patches. Added a patch from Philippe Mathieu-Daudé to replace a magic number with a constant in the smbus_eeprom code and verify the count so there is no overflow. Updated the pm_smbus migration to not update the version numbers in the existing vmstate structures. The needed field didn't accomplish what was needed because it is only called on the save side, not the load side of the migration. So I'm using VMSTATE_STRUCT_TEST() to transfer the pm_smbus data now, that should be all that is required for backwards compatibility, and will be safer for falling back to an older version. I found the problem with the SMBus being broken on piix4 after a migration, but I sent it out as a separate patch since it has nothing to do with this series, and should probably go into the current release being worked on.