linux-kernel - [net-next PATCH v3 2/2] octeontx2-af: fix compiler warnings flagged by Sparse

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Message-ID: <20250311182631.3224812-3-saikrishnag@marvell.com>
Date: Tue, 11 Mar 2025 23:56:31 +0530
From: Sai Krishna <saikrishnag@...vell.com>
To: <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <sgoutham@...vell.com>,
        <gakula@...vell.com>, <lcherian@...vell.com>, <jerinj@...vell.com>,
        <hkelam@...vell.com>, <sbhatta@...vell.com>, <andrew+netdev@...n.ch>,
        <bbhushan2@...vell.com>, <nathan@...nel.org>,
        <ndesaulniers@...gle.com>, <morbo@...gle.com>,
        <justinstitt@...gle.com>, <llvm@...ts.linux.dev>, <horms@...nel.org>
CC: Sai Krishna <saikrishnag@...vell.com>
Subject: [net-next PATCH v3 2/2] octeontx2-af: fix compiler warnings flagged by Sparse

Sparse flagged a number of warnings while typecasting iomem
type to required data type.

For example, fwdata is just a shared memory data structure used
between firmware and kernel, thus remapping and typecasting
to required data type may not cause issue.

Signed-off-by: Sai Krishna <saikrishnag@...vell.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu.c      | 12 +++++++-----
 .../net/ethernet/marvell/octeontx2/nic/otx2_common.c | 10 +++++-----
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
index cd0d7b7774f1..c3a346cff05e 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
@@ -819,13 +819,14 @@ static int rvu_fwdata_init(struct rvu *rvu)
 		goto fail;
 
 	BUILD_BUG_ON(offsetof(struct rvu_fwdata, cgx_fw_data) > FWDATA_CGX_LMAC_OFFSET);
-	rvu->fwdata = ioremap_wc(fwdbase, sizeof(struct rvu_fwdata));
+	rvu->fwdata = (__force struct rvu_fwdata *)
+		ioremap_wc(fwdbase, sizeof(struct rvu_fwdata));
 	if (!rvu->fwdata)
 		goto fail;
 	if (!is_rvu_fwdata_valid(rvu)) {
 		dev_err(rvu->dev,
 			"Mismatch in 'fwdata' struct btw kernel and firmware\n");
-		iounmap(rvu->fwdata);
+		iounmap((void __iomem *)rvu->fwdata);
 		rvu->fwdata = NULL;
 		return -EINVAL;
 	}
@@ -838,7 +839,7 @@ static int rvu_fwdata_init(struct rvu *rvu)
 static void rvu_fwdata_exit(struct rvu *rvu)
 {
 	if (rvu->fwdata)
-		iounmap(rvu->fwdata);
+		iounmap((void __iomem *)rvu->fwdata);
 }
 
 static int rvu_setup_nix_hw_resource(struct rvu *rvu, int blkaddr)
@@ -2384,7 +2385,8 @@ static int rvu_get_mbox_regions(struct rvu *rvu, void **mbox_addr,
 				bar4 = rvupf_read64(rvu, RVU_PF_VF_BAR4_ADDR);
 				bar4 += region * MBOX_SIZE;
 			}
-			mbox_addr[region] = (void *)ioremap_wc(bar4, MBOX_SIZE);
+			mbox_addr[region] = (__force void *)
+				ioremap_wc(bar4, MBOX_SIZE);
 			if (!mbox_addr[region])
 				goto error;
 		}
@@ -2407,7 +2409,7 @@ static int rvu_get_mbox_regions(struct rvu *rvu, void **mbox_addr,
 					  RVU_AF_PF_BAR4_ADDR);
 			bar4 += region * MBOX_SIZE;
 		}
-		mbox_addr[region] = (void *)ioremap_wc(bar4, MBOX_SIZE);
+		mbox_addr[region] = (__force void *)ioremap_wc(bar4, MBOX_SIZE);
 		if (!mbox_addr[region])
 			goto error;
 	}
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
index 2b49bfec7869..e0e592fd02f7 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
@@ -29,10 +29,10 @@ static void otx2_nix_rq_op_stats(struct queue_stats *stats,
 	u64 incr = (u64)qidx << 32;
 	u64 *ptr;
 
-	ptr = (u64 *)otx2_get_regaddr(pfvf, NIX_LF_RQ_OP_OCTS);
+	ptr = (__force u64 *)otx2_get_regaddr(pfvf, NIX_LF_RQ_OP_OCTS);
 	stats->bytes = otx2_atomic64_add(incr, ptr);
 
-	ptr = (u64 *)otx2_get_regaddr(pfvf, NIX_LF_RQ_OP_PKTS);
+	ptr = (__force u64 *)otx2_get_regaddr(pfvf, NIX_LF_RQ_OP_PKTS);
 	stats->pkts = otx2_atomic64_add(incr, ptr);
 }
 
@@ -42,10 +42,10 @@ static void otx2_nix_sq_op_stats(struct queue_stats *stats,
 	u64 incr = (u64)qidx << 32;
 	u64 *ptr;
 
-	ptr = (u64 *)otx2_get_regaddr(pfvf, NIX_LF_SQ_OP_OCTS);
+	ptr = (__force u64 *)otx2_get_regaddr(pfvf, NIX_LF_SQ_OP_OCTS);
 	stats->bytes = otx2_atomic64_add(incr, ptr);
 
-	ptr = (u64 *)otx2_get_regaddr(pfvf, NIX_LF_SQ_OP_PKTS);
+	ptr = (__force u64 *)otx2_get_regaddr(pfvf, NIX_LF_SQ_OP_PKTS);
 	stats->pkts = otx2_atomic64_add(incr, ptr);
 }
 
@@ -853,7 +853,7 @@ void otx2_sqb_flush(struct otx2_nic *pfvf)
 	struct otx2_snd_queue *sq;
 	u64 incr, *ptr, val;
 
-	ptr = (u64 *)otx2_get_regaddr(pfvf, NIX_LF_SQ_OP_STATUS);
+	ptr = (__force u64 *)otx2_get_regaddr(pfvf, NIX_LF_SQ_OP_STATUS);
 	for (qidx = 0; qidx < otx2_get_total_tx_queues(pfvf); qidx++) {
 		sq = &pfvf->qset.sq[qidx];
 		if (!sq->sqb_ptrs)
-- 
2.25.1