net/mlx5: Don't call give_pages() if request 0 page

Firmware will return 0 on query BOOT/INIT PAGES for non-page supplier
functions (external host PF/VF/SF), so no page is needed to be
allocated for them.

Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20240402133043.56322-12-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Jianbo Liu

drivers/net/ethernet/mellanox/mlx5/core/pagealloc.c

@@ -660,6 +660,9 @@ int mlx5_satisfy_startup_pages(struct mlx5_core_dev *dev, int boot)
 	mlx5_core_dbg(dev, "requested %d %s pages for func_id 0x%x\n",
 		      npages, boot ? "boot" : "init", func_id);
 
+	if (!npages)
+		return 0;
+
 	return give_pages(dev, func_id, npages, 0, mlx5_core_is_ecpf(dev));
 }