fsl: add register read-back to set_law()
After programming a new LAW, we should read-back the LAWAR register so that
we sync the writes. Otherwise, code that attempts to use the new LAW-mapped
memory might fail right away.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/drivers/misc/fsl_law.c b/drivers/misc/fsl_law.c
index 147fe0a..7bdd355 100644
--- a/drivers/misc/fsl_law.c
+++ b/drivers/misc/fsl_law.c
@@ -58,7 +58,8 @@
out_be32(lawbar, addr >> 12);
out_be32(lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz);
- return ;
+ /* Read back so that we sync the writes */
+ in_be32(lawar);
}
int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)