of: reserved-memory: Do not make kmemleak ignore freed address

JIRA: https://issues.redhat.com/browse/RHEL-125402

commit 29091a5
Author: Zijun Hu <quic_zijuhu@quicinc.com>
Date:   2025-01-09 21:27:01 +0800

    of: reserved-memory: Do not make kmemleak ignore freed address

    early_init_dt_alloc_reserved_memory_arch() will free address @base when
    suffers memblock_mark_nomap() error, but it still makes kmemleak ignore
    the freed address @base via kmemleak_ignore_phys().

    That is unnecessary, besides, also causes unnecessary warning messages:

    kmemleak_ignore_phys()
     -> make_black_object()
        -> paint_ptr()
           -> kmemleak_warn() // warning message here.

    Fix by avoiding kmemleak_ignore_phys() when suffer the error.

    Fixes: 658aafc ("memblock: exclude MEMBLOCK_NOMAP regions from kmemleak")
    Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
    Link: https://lore.kernel.org/r/20250109-of_core_fix-v4-10-db8a72415b8c@quicinc.com
    Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Signed-off-by: Maxime Ripard <mripard@redhat.com>

Author: Maxime Ripard

drivers/of/of_reserved_mem.c

@@ -52,7 +52,8 @@ static int __init early_init_dt_alloc_reserved_memory_arch(phys_addr_t size,
 			memblock_phys_free(base, size);
 	}
 
-	kmemleak_ignore_phys(base);
+	if (!err)
+		kmemleak_ignore_phys(base);
 
 	return err;
 }