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.... What I've found is that the 'mask' value read from offset 0x2a00 comes back as '0xbad0da00'. This causes the 'engn' variable to be assigned the value 9, which is invalid; then wake_up() is called on an uninitialized waitqueue which causes the crash. Reverting commit 1addc12648521d ("drm/nouveau/fifo/gk104: kick channels when deactivating them") seemed to make the problem go away, although I can't be 100% sure because the problem is sporadic. Attached an example of the kernel log up to the crash. Eric -------------- next part -------------- A non-text attachme...

...t; read from offset 0x2a00 comes back as '0xbad0da00'. This causes the >> 'engn' >> variable to be assigned the value 9, which is invalid; then wake_up() is >> called >> on an uninitialized waitqueue which causes the crash. >> >> Reverting commit 1addc12648521d ("drm/nouveau/fifo/gk104: kick channels >> when >> deactivating them") seemed to make the problem go away, although I can't >> be 100% >> sure because the problem is sporadic. >> >> Attached an example of the kernel log up to the crash. >> &gt...

...ses the >> >> 'engn' >> >> variable to be assigned the value 9, which is invalid; then wake_up() >> >> is >> >> called >> >> on an uninitialized waitqueue which causes the crash. >> >> >> >> Reverting commit 1addc12648521d ("drm/nouveau/fifo/gk104: kick channels >> >> when >> >> deactivating them") seemed to make the problem go away, although I >> >> can't >> >> be 100% >> >> sure because the problem is sporadic. >> >> >> >...