drm/xe/vf: Fix register value lookup

We should use the number of actual entries stored in the runtime
register buffer, not the maximum number of entries that this buffer
can hold, otherwise bsearch() may fail and we may miss the data and
wrongly report unexpected access to some registers.

Fixes: 4edadc4 ("drm/xe/vf: Use register values obtained from the PF")
Signed-off-by: Michal Wajdeczko <[email protected]>
Cc: Piotr Piórkowski <[email protected]>
Cc: Matt Roper <[email protected]>
Reviewed-by: Matt Roper <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit ad16682)
Signed-off-by: Rodrigo Vivi <[email protected]>

Author: mwajdecz

drivers/gpu/drm/xe/xe_gt_sriov_vf.c

@@ -850,7 +850,7 @@ static struct vf_runtime_reg *vf_lookup_reg(struct xe_gt *gt, u32 addr)
 
 	xe_gt_assert(gt, IS_SRIOV_VF(gt_to_xe(gt)));
 
-	return bsearch(&key, runtime->regs, runtime->regs_size, sizeof(key),
+	return bsearch(&key, runtime->regs, runtime->num_regs, sizeof(key),
 		       vf_runtime_reg_cmp);
 }