dell_rbu: use memory_read_from_buffer()
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Abhay Salunke <Abhay_Salunke@dell.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/firmware/dell_rbu.c b/drivers/firmware/dell_rbu.c
index 7430e21..13946eb 100644
--- a/drivers/firmware/dell_rbu.c
+++ b/drivers/firmware/dell_rbu.c
@@ -507,11 +507,6 @@
static ssize_t read_rbu_mono_data(char *buffer, loff_t pos, size_t count)
{
- unsigned char *ptemp = NULL;
- size_t bytes_left = 0;
- size_t data_length = 0;
- ssize_t ret_count = 0;
-
/* check to see if we have something to return */
if ((rbu_data.image_update_buffer == NULL) ||
(rbu_data.bios_image_size == 0)) {
@@ -519,28 +514,11 @@
"bios_image_size %lu\n",
rbu_data.image_update_buffer,
rbu_data.bios_image_size);
- ret_count = -ENOMEM;
- goto read_rbu_data_exit;
+ return -ENOMEM;
}
- if (pos > rbu_data.bios_image_size) {
- ret_count = 0;
- goto read_rbu_data_exit;
- }
-
- bytes_left = rbu_data.bios_image_size - pos;
- data_length = min(bytes_left, count);
-
- ptemp = rbu_data.image_update_buffer;
- memcpy(buffer, (ptemp + pos), data_length);
-
- if ((pos + count) > rbu_data.bios_image_size)
- /* this was the last copy */
- ret_count = bytes_left;
- else
- ret_count = count;
- read_rbu_data_exit:
- return ret_count;
+ return memory_read_from_buffer(buffer, count, &pos,
+ rbu_data.image_update_buffer, rbu_data.bios_image_size);
}
static ssize_t read_rbu_data(struct kobject *kobj,