Here's the code that I have so far for adding a non-blocking interface to the I2C interface. I've debated whether to do this as a patch or just post the files, because the patch is about half the size of the files. I've decided on the diff for now, it seems to be fairly readable. This is relative to 2.6.11-rc2. I have not extensively tested this patch. I've done eeprom operations on the piix4 and i801 chips both with and without updating the those interface for non-blocking operation. I'm going to test the block transfers with the IPMI driver when I get access to a system (this weekend). This is posted for comment. This patch doesn't actually change much. It adds a queue entry that is used to pass around the message data (and is obviously used for queuing :). But this mostly is using the queue entry for data, breaking the operations into smaller functions, and doing the polling in the i2c-core code instead of the drivers themselves (for non-blocking capable drivers). Function for unchanged drivers should be unchanged. This does not implement SMB Alert, which should improve the performace of the IPMI SMB driver. I'll do that in the future and just poll the interface for now. I'll post the changes to the i801 driver next. This patch requires the fixes to the completion code that Mike Waychison posted a few days ago (http://marc.theaimsgroup.com/?l=linux-kernel&m=110669761400454&w=2). Otherwise the wait_for_completion_interruptible() and wait_for_completion_timeout() are broken. In case you missed the previous discussion, I need a non-blocking interface in the I2C code for use by the IPMI SMB driver. The driver needs to be able to do things like store panic information in the SEL, ping the watchdog timer while in a panic, and power the system off. The current I2C driver requires a task context, but you can't exactly do things at panic time with a task context. -Corey -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: i2c_async.diff Url: http://lists.lm-sensors.org/pipermail/lm-sensors/attachments/20050128/3ecb7870/attachment.pl
