Public bug reported:
[Impact]
I2C designware fails to get its adapter number, and this may lead to fail to
access touchpad through I2C bus.
[ 6.476367] WARNING: CPU: 9 PID: 567 at
/build/linux-oem-osp1-bkWHJC/linux-oem-osp1-5.0.0/drivers/i2c/i2c-core-base.c:1322
i2c_add_numbered_adapter+0x81/0x90
[Fix]
The 2 commits from v5.1-rc1 fix this issue.
cd86d1403bb4 i2c: i2c-designware-platdrv: Always use a dynamic adapter number
77f3381a83c2 i2c: i2c-designware-platdrv: Cleanup setting of the adapter
number
[Test]
Verified on Dell machine which had this issue.
[Regression Potential]
Low, the 2 commits make it always use dynamic adapter-numbers which does not
make any difference in most cases and in the one case where it does make a
difference the behavior change is desirable because the old behavior caused an
oops.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: AceLan Kao (acelankao)
Status: In Progress
** Affects: linux-oem-osp1 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Affects: linux-oem-osp1 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Disco)
Importance: Undecided
Status: New
** Affects: linux-oem-osp1 (Ubuntu Disco)
Importance: Undecided
Status: New
** Description changed:
[Impact]
I2C designware fails to get its adapter number, and this may lead to fail to
access touchpad through I2C bus.
[ 6.476367] WARNING: CPU: 9 PID: 567 at
/build/linux-oem-osp1-bkWHJC/linux-oem-osp1-5.0.0/drivers/i2c/i2c-core-base.c:1322
i2c_add_numbered_adapter+0x81/0x90
[Fix]
- The 2 commits fix this issue.
- cd86d1403bb4 i2c: i2c-designware-platdrv: Always use a dynamic adapter
number
- 77f3381a83c2 i2c: i2c-designware-platdrv: Cleanup setting of the adapter
number
+ The 2 commits from v5.1-rc1 fix this issue.
+ cd86d1403bb4 i2c: i2c-designware-platdrv: Always use a dynamic adapter
number
+ 77f3381a83c2 i2c: i2c-designware-platdrv: Cleanup setting of the adapter
number
[Test]
Verified on Dell machine which had this issue.
[Regression Potential]
Low, the 2 commits make it always use dynamic adapter-numbers which does not
make any difference in most cases and in the one case where it does make a
difference the behavior change is desirable because the old behavior caused an
oops.
** Also affects: linux-oem-osp1 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Status: New
** Also affects: linux-oem-osp1 (Ubuntu Disco)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-oem-osp1 (Ubuntu Bionic)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1835150
Title:
Sometimes touchpad detected as mouse(i2c designware fails to get
adapter number)
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