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From:   Przemek Kitszel <przemyslaw.kitszel@intel.com>
To:     Jiri Pirko <jiri@resnulli.us>, netdev@vger.kernel.org,
        "David S . Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Shannon Nelson <shannon.nelson@amd.com>,
        Michael Chan <michael.chan@broadcom.com>,
        Cai Huoqing <cai.huoqing@linux.dev>,
        George Cherian <george.cherian@marvell.com>,
        Danielle Ratson <danieller@nvidia.com>,
        Moshe Shemesh <moshe@nvidia.com>,
        Saeed Mahameed <saeedm@nvidia.com>,
        Ariel Elior <aelior@marvell.com>,
        Manish Chopra <manishc@marvell.com>,
        Igor Russkikh <irusskikh@marvell.com>,
        Coiby Xu <coiby.xu@gmail.com>
Cc:     Brett Creeley <brett.creeley@amd.com>,
        Sunil Goutham <sgoutham@marvell.com>,
        Linu Cherian <lcherian@marvell.com>,
        Geetha sowjanya <gakula@marvell.com>,
        Jerin Jacob <jerinj@marvell.com>,
        hariprasad <hkelam@marvell.com>,
        Subbaraya Sundeep <sbhatta@marvell.com>,
        Ido Schimmel <idosch@nvidia.com>,
        Petr Machata <petrm@nvidia.com>,
        Eran Ben Elisha <eranbe@nvidia.com>,
        Aya Levin <ayal@mellanox.com>,
        Leon Romanovsky <leon@kernel.org>,
        linux-kernel@vger.kernel.org,
        Przemek Kitszel <przemyslaw.kitszel@intel.com>,
        Jesse Brandeburg <jesse.brandeburg@intel.com>
Subject: [PATCH net-next v2 07/11] mlxsw: core: devlink health: use retained error fmsg API
Date:   Tue, 17 Oct 2023 12:53:37 +0200
Message-Id: <20231017105341.415466-8-przemyslaw.kitszel@intel.com>
In-Reply-To: <20231017105341.415466-1-przemyslaw.kitszel@intel.com>
References: <20231017105341.415466-1-przemyslaw.kitszel@intel.com>
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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 <jesse.brandeburg@intel.com>
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
---
add/remove: 0/8 grow/shrink: 0/3 up/down: 0/-694 (-694)
---
 drivers/net/ethernet/mellanox/mlxsw/core.c | 171 ++++++---------------
 1 file changed, 47 insertions(+), 124 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index 1ccf3b73ed72..6df0711607ac 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1792,122 +1792,78 @@ static void mlxsw_core_health_listener_func(const struct mlxsw_reg_info *reg,
 static const struct mlxsw_listener mlxsw_core_health_listener =
 	MLXSW_CORE_EVENTL(mlxsw_core_health_listener_func, MFDE);
 
-static int
+static void
 mlxsw_core_health_fw_fatal_dump_fatal_cause(const char *mfde_pl,
 					    struct devlink_fmsg *fmsg)
 {
 	u32 val, tile_v;
-	int err;
 
 	val = mlxsw_reg_mfde_fatal_cause_id_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "cause_id", val);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "cause_id", val);
 	tile_v = mlxsw_reg_mfde_fatal_cause_tile_v_get(mfde_pl);
 	if (tile_v) {
 		val = mlxsw_reg_mfde_fatal_cause_tile_index_get(mfde_pl);
-		err = devlink_fmsg_u8_pair_put(fmsg, "tile_index", val);
-		if (err)
-			return err;
+		devlink_fmsg_u8_pair_put(fmsg, "tile_index", val);
 	}
-
-	return 0;
 }
 
-static int
+static void
 mlxsw_core_health_fw_fatal_dump_fw_assert(const char *mfde_pl,
 					  struct devlink_fmsg *fmsg)
 {
 	u32 val, tile_v;
-	int err;
 
 	val = mlxsw_reg_mfde_fw_assert_var0_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "var0", val);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "var0", val);
 	val = mlxsw_reg_mfde_fw_assert_var1_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "var1", val);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "var1", val);
 	val = mlxsw_reg_mfde_fw_assert_var2_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "var2", val);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "var2", val);
 	val = mlxsw_reg_mfde_fw_assert_var3_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "var3", val);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "var3", val);
 	val = mlxsw_reg_mfde_fw_assert_var4_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "var4", val);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "var4", val);
 	val = mlxsw_reg_mfde_fw_assert_existptr_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "existptr", val);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "existptr", val);
 	val = mlxsw_reg_mfde_fw_assert_callra_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "callra", val);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "callra", val);
 	val = mlxsw_reg_mfde_fw_assert_oe_get(mfde_pl);
-	err = devlink_fmsg_bool_pair_put(fmsg, "old_event", val);
-	if (err)
-		return err;
+	devlink_fmsg_bool_pair_put(fmsg, "old_event", val);
 	tile_v = mlxsw_reg_mfde_fw_assert_tile_v_get(mfde_pl);
 	if (tile_v) {
 		val = mlxsw_reg_mfde_fw_assert_tile_index_get(mfde_pl);
-		err = devlink_fmsg_u8_pair_put(fmsg, "tile_index", val);
-		if (err)
-			return err;
+		devlink_fmsg_u8_pair_put(fmsg, "tile_index", val);
 	}
 	val = mlxsw_reg_mfde_fw_assert_ext_synd_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "ext_synd", val);
-	if (err)
-		return err;
-
-	return 0;
+	devlink_fmsg_u32_pair_put(fmsg, "ext_synd", val);
 }
 
-static int
+static void
 mlxsw_core_health_fw_fatal_dump_kvd_im_stop(const char *mfde_pl,
 					    struct devlink_fmsg *fmsg)
 {
 	u32 val;
-	int err;
 
 	val = mlxsw_reg_mfde_kvd_im_stop_oe_get(mfde_pl);
-	err = devlink_fmsg_bool_pair_put(fmsg, "old_event", val);
-	if (err)
-		return err;
+	devlink_fmsg_bool_pair_put(fmsg, "old_event", val);
 	val = mlxsw_reg_mfde_kvd_im_stop_pipes_mask_get(mfde_pl);
-	return devlink_fmsg_u32_pair_put(fmsg, "pipes_mask", val);
+	devlink_fmsg_u32_pair_put(fmsg, "pipes_mask", val);
 }
 
-static int
+static void
 mlxsw_core_health_fw_fatal_dump_crspace_to(const char *mfde_pl,
 					   struct devlink_fmsg *fmsg)
 {
 	u32 val;
-	int err;
 
 	val = mlxsw_reg_mfde_crspace_to_log_address_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "log_address", val);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "log_address", val);
 	val = mlxsw_reg_mfde_crspace_to_oe_get(mfde_pl);
-	err = devlink_fmsg_bool_pair_put(fmsg, "old_event", val);
-	if (err)
-		return err;
+	devlink_fmsg_bool_pair_put(fmsg, "old_event", val);
 	val = mlxsw_reg_mfde_crspace_to_log_id_get(mfde_pl);
-	err = devlink_fmsg_u8_pair_put(fmsg, "log_irisc_id", val);
-	if (err)
-		return err;
+	devlink_fmsg_u8_pair_put(fmsg, "log_irisc_id", val);
 	val = mlxsw_reg_mfde_crspace_to_log_ip_get(mfde_pl);
-	err = devlink_fmsg_u64_pair_put(fmsg, "log_ip", val);
-	if (err)
-		return err;
-
-	return 0;
+	devlink_fmsg_u64_pair_put(fmsg, "log_ip", val);
 }
 
 static int mlxsw_core_health_fw_fatal_dump(struct devlink_health_reporter *reporter,
@@ -1918,24 +1874,17 @@ static int mlxsw_core_health_fw_fatal_dump(struct devlink_health_reporter *repor
 	char *val_str;
 	u8 event_id;
 	u32 val;
-	int err;
 
 	if (!priv_ctx)
 		/* User-triggered dumps are not possible */
 		return -EOPNOTSUPP;
 
 	val = mlxsw_reg_mfde_irisc_id_get(mfde_pl);
-	err = devlink_fmsg_u8_pair_put(fmsg, "irisc_id", val);
-	if (err)
-		return err;
-	err = devlink_fmsg_arr_pair_nest_start(fmsg, "event");
-	if (err)
-		return err;
+	devlink_fmsg_u8_pair_put(fmsg, "irisc_id", val);
 
+	devlink_fmsg_arr_pair_nest_start(fmsg, "event");
 	event_id = mlxsw_reg_mfde_event_id_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "id", event_id);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "id", event_id);
 	switch (event_id) {
 	case MLXSW_REG_MFDE_EVENT_ID_CRSPACE_TO:
 		val_str = "CR space timeout";
@@ -1955,24 +1904,13 @@ static int mlxsw_core_health_fw_fatal_dump(struct devlink_health_reporter *repor
 	default:
 		val_str = NULL;
 	}
-	if (val_str) {
-		err = devlink_fmsg_string_pair_put(fmsg, "desc", val_str);
-		if (err)
-			return err;
-	}
-
-	err = devlink_fmsg_arr_pair_nest_end(fmsg);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_arr_pair_nest_start(fmsg, "severity");
-	if (err)
-		return err;
+	if (val_str)
+		devlink_fmsg_string_pair_put(fmsg, "desc", val_str);
+	devlink_fmsg_arr_pair_nest_end(fmsg);
 
+	devlink_fmsg_arr_pair_nest_start(fmsg, "severity");
 	val = mlxsw_reg_mfde_severity_get(mfde_pl);
-	err = devlink_fmsg_u8_pair_put(fmsg, "id", val);
-	if (err)
-		return err;
+	devlink_fmsg_u8_pair_put(fmsg, "id", val);
 	switch (val) {
 	case MLXSW_REG_MFDE_SEVERITY_FATL:
 		val_str = "Fatal";
@@ -1986,15 +1924,9 @@ static int mlxsw_core_health_fw_fatal_dump(struct devlink_health_reporter *repor
 	default:
 		val_str = NULL;
 	}
-	if (val_str) {
-		err = devlink_fmsg_string_pair_put(fmsg, "desc", val_str);
-		if (err)
-			return err;
-	}
-
-	err = devlink_fmsg_arr_pair_nest_end(fmsg);
-	if (err)
-		return err;
+	if (val_str)
+		devlink_fmsg_string_pair_put(fmsg, "desc", val_str);
+	devlink_fmsg_arr_pair_nest_end(fmsg);
 
 	val = mlxsw_reg_mfde_method_get(mfde_pl);
 	switch (val) {
@@ -2007,16 +1939,11 @@ static int mlxsw_core_health_fw_fatal_dump(struct devlink_health_reporter *repor
 	default:
 		val_str = NULL;
 	}
-	if (val_str) {
-		err = devlink_fmsg_string_pair_put(fmsg, "method", val_str);
-		if (err)
-			return err;
-	}
+	if (val_str)
+		devlink_fmsg_string_pair_put(fmsg, "method", val_str);
 
 	val = mlxsw_reg_mfde_long_process_get(mfde_pl);
-	err = devlink_fmsg_bool_pair_put(fmsg, "long_process", val);
-	if (err)
-		return err;
+	devlink_fmsg_bool_pair_put(fmsg, "long_process", val);
 
 	val = mlxsw_reg_mfde_command_type_get(mfde_pl);
 	switch (val) {
@@ -2032,29 +1959,25 @@ static int mlxsw_core_health_fw_fatal_dump(struct devlink_health_reporter *repor
 	default:
 		val_str = NULL;
 	}
-	if (val_str) {
-		err = devlink_fmsg_string_pair_put(fmsg, "command_type", val_str);
-		if (err)
-			return err;
-	}
+	if (val_str)
+		devlink_fmsg_string_pair_put(fmsg, "command_type", val_str);
 
 	val = mlxsw_reg_mfde_reg_attr_id_get(mfde_pl);
-	err = devlink_fmsg_u32_pair_put(fmsg, "reg_attr_id", val);
-	if (err)
-		return err;
+	devlink_fmsg_u32_pair_put(fmsg, "reg_attr_id", val);
 
 	switch (event_id) {
 	case MLXSW_REG_MFDE_EVENT_ID_CRSPACE_TO:
-		return mlxsw_core_health_fw_fatal_dump_crspace_to(mfde_pl,
-								  fmsg);
+		mlxsw_core_health_fw_fatal_dump_crspace_to(mfde_pl, fmsg);
+		break;
 	case MLXSW_REG_MFDE_EVENT_ID_KVD_IM_STOP:
-		return mlxsw_core_health_fw_fatal_dump_kvd_im_stop(mfde_pl,
-								   fmsg);
+		mlxsw_core_health_fw_fatal_dump_kvd_im_stop(mfde_pl, fmsg);
+		break;
 	case MLXSW_REG_MFDE_EVENT_ID_FW_ASSERT:
-		return mlxsw_core_health_fw_fatal_dump_fw_assert(mfde_pl, fmsg);
+		mlxsw_core_health_fw_fatal_dump_fw_assert(mfde_pl, fmsg);
+		break;
 	case MLXSW_REG_MFDE_EVENT_ID_FATAL_CAUSE:
-		return mlxsw_core_health_fw_fatal_dump_fatal_cause(mfde_pl,
-								   fmsg);
+		mlxsw_core_health_fw_fatal_dump_fatal_cause(mfde_pl, fmsg);
+		break;
 	}
 
 	return 0;
-- 
2.40.1