x86, amd_ucode: remove needless cast

Missed cleaning up this cast as part of 0aacc28.
Doing that here; and we can remove 'off' variable as well,
just use *offset in it's place.

Signed-off-by: Aravind Gopalakrishnan <aravind.gopalakrishnan@amd.com>

diff --git a/xen/arch/x86/microcode_amd.c b/xen/arch/x86/microcode_amd.c
index 14728a2f6027403a7cee8d4996098c8888df1ab4..8f16826a72a833fa50f3378d36aabc840b5fc1e2 100644 (file)
--- a/xen/arch/x86/microcode_amd.c
+++ b/xen/arch/x86/microcode_amd.c
@@ -235,27 +235,22 @@ static int get_ucode_from_buffer_amd(
     size_t bufsize,
     size_t *offset)
 {
-    const uint8_t *bufp = buf;
-    size_t off;
-    const struct mpbhdr *mpbuf;
-
-    off = *offset;
+    const struct mpbhdr *mpbuf = buf + *offset;
 
     /* No more data */
-    if ( off >= bufsize )
+    if ( *offset >= bufsize )
     {
         printk(KERN_ERR "microcode: Microcode buffer overrun\n");
         return -EINVAL;
     }
 
-    mpbuf = (const struct mpbhdr *)&bufp[off];
     if ( mpbuf->type != UCODE_UCODE_TYPE )
     {
         printk(KERN_ERR "microcode: Wrong microcode payload type field\n");
         return -EINVAL;
     }
 
-    if ( (off + mpbuf->len) > bufsize )
+    if ( (*offset + mpbuf->len) > bufsize )
     {
         printk(KERN_ERR "microcode: Bad data in microcode data file\n");
         return -EINVAL;
@@ -275,13 +270,13 @@ static int get_ucode_from_buffer_amd(
     }
     memcpy(mc_amd->mpb, mpbuf->data, mpbuf->len);
 
-    *offset = off + mpbuf->len + SECTION_HDR_SIZE;
-
     pr_debug("microcode: CPU%d size %zu, block size %u offset %zu equivID %#x rev %#x\n",
-             raw_smp_processor_id(), bufsize, mpbuf->len, off,
+             raw_smp_processor_id(), bufsize, mpbuf->len, *offset,
              ((struct microcode_header_amd *)mc_amd->mpb)->processor_rev_id,
              ((struct microcode_header_amd *)mc_amd->mpb)->patch_id);
 
+    *offset += mpbuf->len + SECTION_HDR_SIZE;
+
     return 0;
 }