Mesa (8.0): util: fix uninitialized table

[Dylan Noblesmith]

Module: Mesa
Branch: 8.0
Commit: 108d544cae9cb860dbe53e4e0655c80e950808a1
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=108d544cae9cb860dbe53e4e0655c80e950808a1

Author: Dylan Noblesmith <nobled at dreamwidth.org>
Date:   Sun Apr  1 18:35:29 2012 +0000

util: fix uninitialized table

Most of the 256 values in the 'generic_to_slot' table were supposed to
be initialized with the default value 0xff, but were left at zero
(from CALLOC_STRUCT()) instead.

Noticed by clang:

u_linkage.h:60:31: warning: argument to 'sizeof' in 'memset' call is the same expression as the destination;
      did you mean to provide an explicit length? [-Wsizeof-pointer-memaccess]
   memset(table, 0xff, sizeof(table));
          ~~~~~               ^~~~~

Also fix a signed/unsigned comparison and a comment typo here.

NOTE: This is a candidate for the 8.0 branch.

Reviewed-by: Brian Paul <brianp at vmware.com>
(cherry picked from commit 520521e3809a36201582fa48ee173eba12e97812)

---

 src/gallium/auxiliary/util/u_linkage.h   |    9 +++++----
 src/gallium/drivers/nvfx/nvfx_fragprog.c |    3 ++-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/gallium/auxiliary/util/u_linkage.h b/src/gallium/auxiliary/util/u_linkage.h
index 43ec917..7b23123 100644
--- a/src/gallium/auxiliary/util/u_linkage.h
+++ b/src/gallium/auxiliary/util/u_linkage.h
@@ -49,15 +49,16 @@ unsigned util_semantic_set_from_program_file(struct util_semantic_set *set, cons
  *
  * num_slots is the size of the layout array and hardware limit instead.
  *
- * efficient_slots == 0 or efficient_solts == num_slots are typical settings.
+ * efficient_slots == 0 or efficient_slots == num_slots are typical settings.
  */
 void util_semantic_layout_from_set(unsigned char *layout, const struct util_semantic_set *set, unsigned efficient_slots, unsigned num_slots);
 
 static INLINE void
-util_semantic_table_from_layout(unsigned char *table, unsigned char *layout, unsigned char first_slot_value, unsigned char num_slots)
+util_semantic_table_from_layout(unsigned char *table, size_t table_size, unsigned char *layout,
+                                unsigned char first_slot_value, unsigned char num_slots)
 {
-   int i;
-   memset(table, 0xff, sizeof(table));
+   unsigned char i;
+   memset(table, 0xff, table_size);
 
    for(i = 0; i < num_slots; ++i)
       table[layout[i]] = first_slot_value + i;
diff --git a/src/gallium/drivers/nvfx/nvfx_fragprog.c b/src/gallium/drivers/nvfx/nvfx_fragprog.c
index dbd7c77..0babcbb 100644
--- a/src/gallium/drivers/nvfx/nvfx_fragprog.c
+++ b/src/gallium/drivers/nvfx/nvfx_fragprog.c
@@ -977,7 +977,8 @@ nvfx_fragprog_prepare(struct nvfx_context* nvfx, struct nvfx_fpc *fpc)
 	if(fpc->fp->num_slots > num_texcoords)
 		return FALSE;
 	util_semantic_layout_from_set(fpc->fp->slot_to_generic, &set, 0, num_texcoords);
-	util_semantic_table_from_layout(fpc->generic_to_slot, fpc->fp->slot_to_generic, 0, num_texcoords);
+	util_semantic_table_from_layout(fpc->generic_to_slot, sizeof fpc->generic_to_slot,
+                                        fpc->fp->slot_to_generic, 0, num_texcoords);
 
 	memset(fpc->fp->slot_to_fp_input, 0xff, sizeof(fpc->fp->slot_to_fp_input));