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From: Luiz Capitulino <luizcap@redhat.com>
To: ilpo.jarvinen@linux.intel.com,
	shravankr@nvidia.com
Cc: davthompson@nvidia.com,
	ndalvi@redhat.com,
	linux-kernel@vger.kernel.org,
	platform-driver-x86@vger.kernel.org,
	Luiz Capitulino <luizcap@redhat.com>
Subject: [PATCH 1/2] platform/mellanox: mlxbf-pmc: mlxbf_pmc_event_list(): make size ptr optional
Date: Thu, 22 Feb 2024 15:57:29 -0500
Message-ID: <182de8ec6b9c33152f2ba6b248c35b0311abf5e4.1708635408.git.luizcap@redhat.com>
In-Reply-To: <cover.1708635408.git.luizcap@redhat.com>
References: <cover.1708635408.git.luizcap@redhat.com>
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The mlxbf_pmc_event_list() function returns a pointer to an array of
supported events and the array size. The array size is returned via
a pointer passed as an argument, which is mandatory.

However, we want to be able to use mlxbf_pmc_event_list() just to check
if a block name is implemented/supported. For this usage passing the size
argument is not necessary so let's make it optional.

Signed-off-by: Luiz Capitulino <luizcap@redhat.com>
---
 drivers/platform/mellanox/mlxbf-pmc.c | 40 +++++++++++++++------------
 1 file changed, 22 insertions(+), 18 deletions(-)

diff --git a/drivers/platform/mellanox/mlxbf-pmc.c b/drivers/platform/mellanox/mlxbf-pmc.c
index 250405bb59a7..b71636eb3db1 100644
--- a/drivers/platform/mellanox/mlxbf-pmc.c
+++ b/drivers/platform/mellanox/mlxbf-pmc.c
@@ -966,32 +966,33 @@ static bool mlxbf_pmc_valid_range(unsigned int blk_num, u32 offset)
 }
 
 /* Get the event list corresponding to a certain block */
-static const struct mlxbf_pmc_events *mlxbf_pmc_event_list(const char *blk, size_t *size)
+static const struct mlxbf_pmc_events *mlxbf_pmc_event_list(const char *blk, size_t *psize)
 {
 	const struct mlxbf_pmc_events *events;
+	size_t size;
 
 	if (strstr(blk, "tilenet")) {
 		events = mlxbf_pmc_hnfnet_events;
-		*size = ARRAY_SIZE(mlxbf_pmc_hnfnet_events);
+		size = ARRAY_SIZE(mlxbf_pmc_hnfnet_events);
 	} else if (strstr(blk, "tile")) {
 		events = mlxbf_pmc_hnf_events;
-		*size = ARRAY_SIZE(mlxbf_pmc_hnf_events);
+		size = ARRAY_SIZE(mlxbf_pmc_hnf_events);
 	} else if (strstr(blk, "triogen")) {
 		events = mlxbf_pmc_smgen_events;
-		*size = ARRAY_SIZE(mlxbf_pmc_smgen_events);
+		size = ARRAY_SIZE(mlxbf_pmc_smgen_events);
 	} else if (strstr(blk, "trio")) {
 		switch (pmc->event_set) {
 		case MLXBF_PMC_EVENT_SET_BF1:
 			events = mlxbf_pmc_trio_events_1;
-			*size = ARRAY_SIZE(mlxbf_pmc_trio_events_1);
+			size = ARRAY_SIZE(mlxbf_pmc_trio_events_1);
 			break;
 		case MLXBF_PMC_EVENT_SET_BF2:
 			events = mlxbf_pmc_trio_events_2;
-			*size = ARRAY_SIZE(mlxbf_pmc_trio_events_2);
+			size = ARRAY_SIZE(mlxbf_pmc_trio_events_2);
 			break;
 		default:
 			events = NULL;
-			*size = 0;
+			size = 0;
 			break;
 		}
 	} else if (strstr(blk, "mss")) {
@@ -999,43 +1000,46 @@ static const struct mlxbf_pmc_events *mlxbf_pmc_event_list(const char *blk, size
 		case MLXBF_PMC_EVENT_SET_BF1:
 		case MLXBF_PMC_EVENT_SET_BF2:
 			events = mlxbf_pmc_mss_events_1;
-			*size = ARRAY_SIZE(mlxbf_pmc_mss_events_1);
+			size = ARRAY_SIZE(mlxbf_pmc_mss_events_1);
 			break;
 		case MLXBF_PMC_EVENT_SET_BF3:
 			events = mlxbf_pmc_mss_events_3;
-			*size = ARRAY_SIZE(mlxbf_pmc_mss_events_3);
+			size = ARRAY_SIZE(mlxbf_pmc_mss_events_3);
 			break;
 		default:
 			events = NULL;
-			*size = 0;
+			size = 0;
 			break;
 		}
 	} else if (strstr(blk, "ecc")) {
 		events = mlxbf_pmc_ecc_events;
-		*size = ARRAY_SIZE(mlxbf_pmc_ecc_events);
+		size = ARRAY_SIZE(mlxbf_pmc_ecc_events);
 	} else if (strstr(blk, "pcie")) {
 		events = mlxbf_pmc_pcie_events;
-		*size = ARRAY_SIZE(mlxbf_pmc_pcie_events);
+		size = ARRAY_SIZE(mlxbf_pmc_pcie_events);
 	} else if (strstr(blk, "l3cache")) {
 		events = mlxbf_pmc_l3c_events;
-		*size = ARRAY_SIZE(mlxbf_pmc_l3c_events);
+		size = ARRAY_SIZE(mlxbf_pmc_l3c_events);
 	} else if (strstr(blk, "gic")) {
 		events = mlxbf_pmc_smgen_events;
-		*size = ARRAY_SIZE(mlxbf_pmc_smgen_events);
+		size = ARRAY_SIZE(mlxbf_pmc_smgen_events);
 	} else if (strstr(blk, "smmu")) {
 		events = mlxbf_pmc_smgen_events;
-		*size = ARRAY_SIZE(mlxbf_pmc_smgen_events);
+		size = ARRAY_SIZE(mlxbf_pmc_smgen_events);
 	} else if (strstr(blk, "llt_miss")) {
 		events = mlxbf_pmc_llt_miss_events;
-		*size = ARRAY_SIZE(mlxbf_pmc_llt_miss_events);
+		size = ARRAY_SIZE(mlxbf_pmc_llt_miss_events);
 	} else if (strstr(blk, "llt")) {
 		events = mlxbf_pmc_llt_events;
-		*size = ARRAY_SIZE(mlxbf_pmc_llt_events);
+		size = ARRAY_SIZE(mlxbf_pmc_llt_events);
 	} else {
 		events = NULL;
-		*size = 0;
+		size = 0;
 	}
 
+	if (psize)
+		*psize = size;
+
 	return events;
 }
 
-- 
2.43.1