APPLIED/Cmnt: [SRU][F:linux-bluefield][PATCH v4 0/1] UBUNTU: SAUCE: i2c-mlxbf.c: support lock mechanism

Stefan Bader stefan.bader at canonical.com
Tue Aug 23 08:25:39 UTC 2022


On 21.07.22 16:05, Asmaa Mnebhi wrote:
> Buglink: https://bugs.launchpad.net/bugs/1981105
> 
> SRU Justification:
> 
> [Impact]
> 
> Support the I2C lock mechanism, otherwise there could be unexpected behavior when an i2c bus is accessed by several entities like the linux driver, ATF driver and UEFI driver. Make sure to pick up the ATF/UEFI image to accompany this change
> because at boot time ATF will ensure that the lock is released.
> 
> [Fix]
> 
> * Support lock and unlock
> * replace ioremap_nocache with ioremap
> 
> [Test Case]
> 
> * Make sure the i2c-mlxbf.c driver is loaded and /dev/i2c-1 is created
> * check that ipmitool from the BF->BMC and from the BMC->BF work (this only applies on boards with a BMC of course)
> 
> [Regression Potential]
> 
> Any of the test cases above could be impacted due to these changes.
> Make sure you load the latest ATF/UEFI image to accompany this change.
> 

Applied to focal:linux-bluefield/master-next already. However the tracking bug 
has not been adjusted to have a Focal task (I have done this now but not sure 
this will help). This will likely cause confusion with verification requested. 
Also there was no email sent when applying the patch.

-Stefan
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