[Bug 1876699] Autopkgtest regression report (linux-oracle-5.4/5.4.0-1019.19~18.04.1)

All autopkgtests for the newly accepted linux-oracle-5.4 (5.4.0-1019.19~18.04.1) for bionic have finished running.
The following regressions have been reported in tests triggered by the package:

zfs-linux/unknown (armhf)


Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-
migration/bionic/update_excuses.html#linux-oracle-5.4

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

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https://bugs.launchpad.net/bugs/1876699

Title:
add 16-bit width registers support for EEPROM at24 device

Status in linux package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Fix Committed
Status in linux source package in Focal:
Fix Released

Bug description:
SRU For Bionic

[Impact]
Larger EEPROM devices that use 16-bit addresses couldn't be accessed.

The i2c/smbus currently only support to access data with 8-bit width of
address. In some larger device, such as larger EEPROM, it requires to
access the address large than 0xff, so it needs to extend address space
to 16-bit width.

[Fix]
This commit is derivated from below commit, and then modified and provided
by customer
https://patchwork.ozlabs.org/patch/545292/

Unfortunately, this commit doesn't get into mainline in the end, so I migrate the commit to latest kernel and finally get it merged.
https://lkml.org/lkml/2020/4/24/635

[Test]
Verified on Eurotech's platforms.

[Regression Potential]
Low, this patch only changes the behavior of the device which has AT24_FLAG_ADDR16 flag and change the page_size to 64 if the device name is 24c256.

=====================================
SRU For Focal

[Impact]
Larger EEPROM devices that use 16-bit addresses couldn't be accessed.

The i2c/smbus currently only support to access data with 8-bit width of
address. In some larger device, such as larger EEPROM, it requires to
access the address large than 0xff, so it needs to extend address space
to 16-bit width.

[Fix]
Clear cherry pick from linux-next
82f25bd73c0b regmap-i2c: add 16-bit width registers support

[Test]
Verified on Eurotech's platforms.

[Regression Potential]
Low, this patch provides new access functions for 16-bit registers,
shouldn't affect any other devices which are already working well.

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