ACPI: EC: Use kmemdup

Use kmemdup when some other buffer is immediately copied into the
allocated region.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
statement S;
@@

-  to = \(kmalloc\|kzalloc\)(size,flag);
+  to = kmemdup(from,size,flag);
   if (to==NULL || ...) S
-  memcpy(to, from, size);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index f2234db..e61d4f8 100644 (file)
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1027,10 +1027,9 @@ int __init acpi_ec_ecdt_probe(void)
                /* Don't trust ECDT, which comes from ASUSTek */
                if (!EC_FLAGS_VALIDATE_ECDT)
                        goto install;
-               saved_ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+               saved_ec = kmemdup(boot_ec, sizeof(struct acpi_ec), GFP_KERNEL);
                if (!saved_ec)
                        return -ENOMEM;
-               memcpy(saved_ec, boot_ec, sizeof(struct acpi_ec));
        /* fall through */
        }