diff options
| author | Pierre Gondois <pierre.gondois@arm.com> | 2023-04-14 10:14:51 +0200 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2023-04-14 10:13:38 +0100 |
| commit | 3522340199cc060b70f0094e3039bdb43c3f6ee1 (patch) | |
| tree | d6d5dbca14b7deb6097bee28be64bb4b99989fe5 /drivers/base | |
| parent | cde0fbff07eff7e4e0e85fa053fe19a24c86b1e0 (diff) | |
| download | linux-next-3522340199cc060b70f0094e3039bdb43c3f6ee1.tar.gz | |
arch_topology: Remove early cacheinfo error message if -ENOENT
fetch_cache_info() tries to get the number of cache leaves/levels
for each CPU in order to pre-allocate memory for cacheinfo struct.
Allocating this memory later triggers a:
'BUG: sleeping function called from invalid context'
in PREEMPT_RT kernels.
If there is no cache related information available in DT or ACPI,
fetch_cache_info() fails and an error message is printed:
'Early cacheinfo failed, ret = ...'
Not having cache information should be a valid configuration.
Remove the error message if fetch_cache_info() fails with -ENOENT.
Suggested-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/all/20230404-hatred-swimmer-6fecdf33b57a@spud/
Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230414081453.244787-4-pierre.gondois@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/arch_topology.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index 147fb7d4af96..b741b5ba82bd 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -843,10 +843,11 @@ void __init init_cpu_topology(void) for_each_possible_cpu(cpu) { ret = fetch_cache_info(cpu); - if (ret) { + if (!ret) + continue; + else if (ret != -ENOENT) pr_err("Early cacheinfo failed, ret = %d\n", ret); - break; - } + return; } } |