Reset saved state for disasm when we've lost the context.

src/mesa/drivers/dri/i915tex/i915_disasm.c

@@ -731,3 +731,10 @@ i915_disasm(uint32_t *data, int count, uint32_t hw_offset)
 
     return failures;
 }
+
+void i915_disasm_context_reset()
+{
+    saved_s2_set = 0;
+    saved_s4_set = 1;
+}
+

src/mesa/drivers/dri/i915tex/i915_disasm.h

@@ -26,3 +26,4 @@
  */
 
 int i915_disasm(uint32_t *data, int count, uint32_t hw_offset);
+void i915_disasm_context_reset();

src/mesa/drivers/dri/i915tex/intel_context.c

@@ -59,6 +59,7 @@
 #include "intel_regions.h"
 #include "intel_buffer_objects.h"
 #include "intel_fbo.h"
+#include "i915_disasm.h"
 
 #include "drirenderbuffer.h"
 #include "vblank.h"
@@ -646,6 +647,8 @@ intelContendedLock(struct intel_context *intel, GLuint flags)
    if (!intel->intelScreen->ttm && sarea->texAge != intel->hHWContext) {
       sarea->texAge = intel->hHWContext;
       dri_bufmgr_fake_contended_lock_take(intel->intelScreen->bufmgr);
+      if (INTEL_DEBUG & DEBUG_BATCH)
+	 i915_disasm_context_reset();
    }
 
    if (sarea->width != intelScreen->width ||