From: Pierre Gondois pierre.gondois@arm.com
[ Upstream commit 8844c3df001bc1d8397fddea341308da63855d53 ] Make init_of_cache_level() return an error code when the cache information parsing fails to help detecting missing information.
init_of_cache_level() is only called for riscv. Returning an error code instead of 0 will prevent detect_cache_attributes() to allocate memory if an incomplete DT is parsed.
Signed-off-by: Pierre Gondois pierre.gondois@arm.com Acked-by: Palmer Dabbelt palmer@rivosinc.com Link: https://lore.kernel.org/r/20230104183033.755668-3-pierre.gondois@arm.com Signed-off-by: Sudeep Holla sudeep.holla@arm.com Cc: stable@vger.kernel.org Signed-off-by: Wen Yang wen.yang@linux.dev --- drivers/base/cacheinfo.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c index 7663eaddd168..480007210bcc 100644 --- a/drivers/base/cacheinfo.c +++ b/drivers/base/cacheinfo.c @@ -245,11 +245,11 @@ int init_of_cache_level(unsigned int cpu) of_node_put(prev); prev = np; if (!of_device_is_compatible(np, "cache")) - break; + goto err_out; if (of_property_read_u32(np, "cache-level", &level)) - break; + goto err_out; if (level <= levels) - break; + goto err_out; if (of_property_read_bool(np, "cache-size")) ++leaves; if (of_property_read_bool(np, "i-cache-size")) @@ -264,6 +264,10 @@ int init_of_cache_level(unsigned int cpu) this_cpu_ci->num_leaves = leaves;
return 0; + +err_out: + of_node_put(np); + return -EINVAL; }
#else