optee: add writeback to valid memory type

Only in smp systems the cache policy is setup as write alloc, in
single cpu systems the cache policy is set as writeback and it is
normal memory, so, it should pass the is_normal_memory check in the
share memory registration.

Add the right condition to make it work in no smp systems.

Fixes: cdbcf83d29c1 ("tee: optee: check type of registered shared memory")
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
index 20b6fd7383c54b8ec059c258cce57aa09dd5e8ed..c981757ba0d4052733484c89a566be15255c08fc 100644 (file)
--- a/drivers/tee/optee/call.c
+++ b/drivers/tee/optee/call.c
@@ -534,7 +534,8 @@ void optee_free_pages_list(void *list, size_t num_entries)
 static bool is_normal_memory(pgprot_t p)
 {
 #if defined(CONFIG_ARM)
-       return (pgprot_val(p) & L_PTE_MT_MASK) == L_PTE_MT_WRITEALLOC;
+       return (((pgprot_val(p) & L_PTE_MT_MASK) == L_PTE_MT_WRITEALLOC) ||
+               ((pgprot_val(p) & L_PTE_MT_MASK) == L_PTE_MT_WRITEBACK));
 #elif defined(CONFIG_ARM64)
        return (pgprot_val(p) & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL);
 #else