linux-kernel - [PATCH] i40e (gcc13): synchronize allocate/free functions return type & values

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Message-Id: <20221031114456.10482-1-jirislaby@kernel.org>
Date:   Mon, 31 Oct 2022 12:44:56 +0100
From:   "Jiri Slaby (SUSE)" <jirislaby@...nel.org>
To:     jesse.brandeburg@...el.com
Cc:     linux-kernel@...r.kernel.org,
        "Jiri Slaby (SUSE)" <jirislaby@...nel.org>,
        Martin Liska <mliska@...e.cz>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org
Subject: [PATCH] i40e (gcc13): synchronize allocate/free functions return type & values

i40e allocate/free functions generate a valid warning with gcc-13:
  drivers/net/ethernet/intel/i40e/i40e_main.c:129:5: error: conflicting types for 'i40e_allocate_dma_mem_d' due to enum/integer mismatch; have 'int(struct i40e_hw *, struct i40e_dma_mem *, u64,  u32)' {aka 'int(struct i40e_hw *, struct i40e_dma_mem *, long long unsigned int,  unsigned int)'} [-Werror=enum-int-mismatch]
  drivers/net/ethernet/intel/i40e/i40e_osdep.h:40:25: note: previous declaration of 'i40e_allocate_dma_mem_d' with type 'i40e_status(struct i40e_hw *, struct i40e_dma_mem *, u64,  u32)' {aka 'enum i40e_status_code(struct i40e_hw *, struct i40e_dma_mem *, long long unsigned int,  unsigned int)'}
...

I.e. the type of their return value in the definition is int, while the
declaration spell enum i40e_status. Synchronize the definitions to the
latter.

And make sure proper values are returned. I.e. I40E_SUCCESS and not 0,
I40E_ERR_NO_MEMORY and not -ENOMEM.

Cc: Martin Liska <mliska@...e.cz>
Cc: Jesse Brandeburg <jesse.brandeburg@...el.com>
Cc: Tony Nguyen <anthony.l.nguyen@...el.com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Eric Dumazet <edumazet@...gle.com>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Paolo Abeni <pabeni@...hat.com>
Cc: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@...nel.org>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 25 +++++++++++----------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 1a1fab94205d..92fd4db7195f 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -126,8 +126,9 @@ static void netdev_hw_addr_refcnt(struct i40e_mac_filter *f,
  * @size: size of memory requested
  * @alignment: what to align the allocation to
  **/
-int i40e_allocate_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem,
-			    u64 size, u32 alignment)
+i40e_status i40e_allocate_dma_mem_d(struct i40e_hw *hw,
+				    struct i40e_dma_mem *mem, u64 size,
+				    u32 alignment)
 {
 	struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 
@@ -135,9 +136,9 @@ int i40e_allocate_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem,
 	mem->va = dma_alloc_coherent(&pf->pdev->dev, mem->size, &mem->pa,
 				     GFP_KERNEL);
 	if (!mem->va)
-		return -ENOMEM;
+		return I40E_ERR_NO_MEMORY;
 
-	return 0;
+	return I40E_SUCCESS;
 }
 
 /**
@@ -145,7 +146,7 @@ int i40e_allocate_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem,
  * @hw:   pointer to the HW structure
  * @mem:  ptr to mem struct to free
  **/
-int i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
+i40e_status i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 {
 	struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 
@@ -154,7 +155,7 @@ int i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 	mem->pa = 0;
 	mem->size = 0;
 
-	return 0;
+	return I40E_SUCCESS;
 }
 
 /**
@@ -163,16 +164,16 @@ int i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
  * @mem:  ptr to mem struct to fill out
  * @size: size of memory requested
  **/
-int i40e_allocate_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem,
-			     u32 size)
+i40e_status i40e_allocate_virt_mem_d(struct i40e_hw *hw,
+				     struct i40e_virt_mem *mem, u32 size)
 {
 	mem->size = size;
 	mem->va = kzalloc(size, GFP_KERNEL);
 
 	if (!mem->va)
-		return -ENOMEM;
+		return I40E_ERR_NO_MEMORY;
 
-	return 0;
+	return I40E_SUCCESS;
 }
 
 /**
@@ -180,14 +181,14 @@ int i40e_allocate_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem,
  * @hw:   pointer to the HW structure
  * @mem:  ptr to mem struct to free
  **/
-int i40e_free_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem)
+i40e_status i40e_free_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem)
 {
 	/* it's ok to kfree a NULL pointer */
 	kfree(mem->va);
 	mem->va = NULL;
 	mem->size = 0;
 
-	return 0;
+	return I40E_SUCCESS;
 }
 
 /**
-- 
2.38.1