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| author | Huacai Chen <[email protected]> | 2024-06-18 08:13:36 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2024-06-23 18:04:14 +0000 |
| commit | 6ef8eb5125722c241fd60d7b0c872d5c2e5dd4ca (patch) | |
| tree | b3ecd3a1ac8a167ff3b1aaebc8082b3c6e3ef313 /drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | |
| parent | cpu/hotplug: Fix dynstate assignment in __cpuhp_setup_state_cpuslocked() (diff) | |
| download | kernel-6ef8eb5125722c241fd60d7b0c872d5c2e5dd4ca.tar.gz kernel-6ef8eb5125722c241fd60d7b0c872d5c2e5dd4ca.zip | |
cpu: Fix broken cmdline "nosmp" and "maxcpus=0"
After the rework of "Parallel CPU bringup", the cmdline "nosmp" and
"maxcpus=0" parameters are not working anymore. These parameters set
setup_max_cpus to zero and that's handed to bringup_nonboot_cpus().
The code there does a decrement before checking for zero, which brings it
into the negative space and brings up all CPUs.
Add a zero check at the beginning of the function to prevent this.
[ tglx: Massaged change log ]
Fixes: 18415f33e2ac4ab382 ("cpu/hotplug: Allow "parallel" bringup up to CPUHP_BP_KICK_AP_STATE")
Fixes: 06c6796e0304234da6 ("cpu/hotplug: Fix off by one in cpuhp_bringup_mask()")
Signed-off-by: Huacai Chen <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c')
0 files changed, 0 insertions, 0 deletions