firmware: make fw->data const

In preparation for supporting firmware files linked into the static
kernel, make fw->data const to ensure that users aren't modifying it (so
that we can pass a pointer to the original in-kernel copy, rather than
having to copy it).

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 9fd4a85..264b3a2 100644 (file)
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -257,7 +257,7 @@ firmware_data_write(struct kobject *kobj, struct bin_attribute *bin_attr,
        if (retval)
                goto out;
 
-       memcpy(fw->data + offset, buffer, count);
+       memcpy((u8 *)fw->data + offset, buffer, count);
 
        fw->size = max_t(size_t, offset + count, fw->size);
        retval = count;

diff --git a/include/linux/firmware.h b/include/linux/firmware.h
index 6c7eff2..88718d6 100644 (file)
--- a/include/linux/firmware.h
+++ b/include/linux/firmware.h
@@ -8,7 +8,7 @@
 
 struct firmware {
        size_t size;
-       u8 *data;
+       const u8 *data;
 };
 
 struct device;