Public bug reported:
SRU Justification:
[Impact]
* The previous ipmb_host patch broke the customer tests. They requested to make
the ipmb_host response time as long as before. In the case where the I2C bus is
made very busy, the ipmb_host driver just drops slow/delayed responses. This
fix elongates the timeout of the response.
* Fixes a crash which occurs after powercycling certain BlueField-2 systems.
* The crash is due to the handshake which takes too long to wait for a response
at boot time.
[Fix]
* Before executing the IPMB handshake which loads the ipmb_host driver, detect
if there is a slave detected and make sure that the slave can respond.
* Free current_msg pointer right after sending the message so that sent
transactions are independent of the response transactions.
[Test Case]
* soft reset
* powercycle
* run ipmitool commands
* remove and load module manually
[Regression Potential]
* The regression can be considered as low, since:
* it restores previous stable code for the customer
* and fixes a crash occurring after powercycling certain BlueField-2 systems.
** Affects: linux-bluefield (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1922393
Title:
ipmb_host.c: Fix slow transactions
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