Re: [PATCH net-next v2 08/11] net/mlx5: devlink health: use retained error fmsg API

On Tue, Oct 17, 2023 at 12:53:38PM +0200, Przemek Kitszel wrote:

Drop unneeded error checking.

devlink_fmsg_*() family of functions is now retaining errors,
so there is no need to check for them after each call.

Reviewed-by: Jesse Brandeburg <redacted>
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>

...

Hi Przemek,

The code above this hunk looks like this:

        do {
                cmd_err = mlx5_rsc_dump_next(mdev, cmd, page, &size);
                if (cmd_err < 0) {
                        err = cmd_err;

clang-16 W=1 warns that err, which is used as the return value of the
function, will be uninitialised if the loop never hits this condition.

Smatch also warns about this.

 			goto destroy_cmd;
 		}
 
-		err = mlx5e_health_rsc_fmsg_binary(fmsg, page_address(page), size);
-		if (err)
-			goto destroy_cmd;
-
+		mlx5e_health_rsc_fmsg_binary(fmsg, page_address(page), size);
 	} while (cmd_err > 0);
 
 destroy_cmd:
 	mlx5_rsc_dump_cmd_destroy(cmd);
-	end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
-	if (end_err)
-		err = end_err;
+	devlink_fmsg_binary_pair_nest_end(fmsg);
 free_page:
 	__free_page(page);
 	return err;
 }

...