Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 10 Jan 2024 16:56:19 -0600 | Subject | Re: i2c-designware: NULL ptr at RIP: 0010:regmap_read+0x12/0x70 | From | Kim Phillips <> |
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Hi,
On 1/9/24 4:11 AM, Jarkko Nikula wrote> On 1/9/24 09:56, V, Narasimhan wrote: >> * Looks like the issue is with this below commit: >> * i2c: designware: Fix lock probe call order in dw_i2c_plat_probe() >> > Hmm... This makes me even more confused since your device AMDI0010 should not even use the access semaphore. > > So linux-next works if you run a commit before it or revert these three patches? (commit 2f571a725434 ("i2c: designware: Fix lock probe call order in dw_i2c_plat_probe()") doesn't revert without reverting two other related commits after it) > > git show f9b51f600217b38f46ea39d6aa445e594bf3eb30 |patch -p1 -R > git show b8034c7d28a988be82efbf4d65faa847334811f7 |patch -p1 -R > git show 2f571a72543463ef07dc3ac61e7b703b9ad997f9 |patch -p1 -R
Narasimhan is right, if I check out, build and boot this commit:
2f571a725434 i2c: designware: Fix lock probe call order in dw_i2c_plat_probe()
I get the same stacktrace on the serial console.
If I try the previous commit (174a0c565cea "efi/loongarch: Directly position the loaded image file"), the system boots fine.
The same thing happens with the three reversions above: next-20240110 gets the stacktrace, but with the three reversions, it doesn't.
Is your parallel post probe runtime suspending time window theory no longer applicable? These AMD EPYC systems have a lot more cores than their client equivalents, and AMD power management code has had a lot of improvements lately.
Thanks,
Kim
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