* [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed
@ 2018-11-28 8:05 Wen Yang
2018-12-03 6:43 ` Sumit Saxena
0 siblings, 1 reply; 6+ messages in thread
From: Wen Yang @ 2018-11-28 8:05 UTC (permalink / raw)
To: kashyap.desai, sumit.saxena, shivasharan.srikanteshwara
Cc: linux-kernel, zhong.weidong, Wen Yang, Julia Lawall
dma_pool_destroy(NULL) is safe, so removes NULL check before freeing
the mem. This patch also fix the ifnullfree.cocci warnings.
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
CC: Julia Lawall <julia.lawall@lip6.fr>
CC: Kashyap Desai <kashyap.desai@broadcom.com>
CC: Sumit Saxena <sumit.saxena@broadcom.com>
CC: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
CC: linux-kernel@vger.kernel.org
---
drivers/scsi/megaraid/megaraid_sas_fusion.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index f74b5ea24f0f..aa477f09a7a5 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -807,10 +807,8 @@ megasas_free_rdpq_fusion(struct megasas_instance *instance) {
}
- if (fusion->reply_frames_desc_pool)
- dma_pool_destroy(fusion->reply_frames_desc_pool);
- if (fusion->reply_frames_desc_pool_align)
- dma_pool_destroy(fusion->reply_frames_desc_pool_align);
+ dma_pool_destroy(fusion->reply_frames_desc_pool);
+ dma_pool_destroy(fusion->reply_frames_desc_pool_align);
if (fusion->rdpq_virt)
dma_free_coherent(&instance->pdev->dev,
@@ -830,8 +828,7 @@ megasas_free_reply_fusion(struct megasas_instance *instance) {
fusion->reply_frames_desc[0],
fusion->reply_frames_desc_phys[0]);
- if (fusion->reply_frames_desc_pool)
- dma_pool_destroy(fusion->reply_frames_desc_pool);
+ dma_pool_destroy(fusion->reply_frames_desc_pool);
}
@@ -1627,8 +1624,7 @@ static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance)
fusion->ioc_init_cmd->frame,
fusion->ioc_init_cmd->frame_phys_addr);
- if (fusion->ioc_init_cmd)
- kfree(fusion->ioc_init_cmd);
+ kfree(fusion->ioc_init_cmd);
}
/**
--
2.19.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed
2018-11-28 8:05 [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed Wen Yang
@ 2018-12-03 6:43 ` Sumit Saxena
0 siblings, 0 replies; 6+ messages in thread
From: Sumit Saxena @ 2018-12-03 6:43 UTC (permalink / raw)
To: wen.yang99
Cc: Kashyap Desai, Shivasharan Srikanteshwara, LKML, zhong.weidong,
Julia Lawall
On Wed, Nov 28, 2018 at 1:36 PM Wen Yang <wen.yang99@zte.com.cn> wrote:
>
> dma_pool_destroy(NULL) is safe, so removes NULL check before freeing
> the mem. This patch also fix the ifnullfree.cocci warnings.
>
> Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Acked-by: Sumit Saxena <sumit.saxena@broadcom.com>
> CC: Julia Lawall <julia.lawall@lip6.fr>
> CC: Kashyap Desai <kashyap.desai@broadcom.com>
> CC: Sumit Saxena <sumit.saxena@broadcom.com>
> CC: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
> CC: linux-kernel@vger.kernel.org
> ---
> drivers/scsi/megaraid/megaraid_sas_fusion.c | 12 ++++--------
> 1 file changed, 4 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
> index f74b5ea24f0f..aa477f09a7a5 100644
> --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
> +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
> @@ -807,10 +807,8 @@ megasas_free_rdpq_fusion(struct megasas_instance *instance) {
>
> }
>
> - if (fusion->reply_frames_desc_pool)
> - dma_pool_destroy(fusion->reply_frames_desc_pool);
> - if (fusion->reply_frames_desc_pool_align)
> - dma_pool_destroy(fusion->reply_frames_desc_pool_align);
> + dma_pool_destroy(fusion->reply_frames_desc_pool);
> + dma_pool_destroy(fusion->reply_frames_desc_pool_align);
>
> if (fusion->rdpq_virt)
> dma_free_coherent(&instance->pdev->dev,
> @@ -830,8 +828,7 @@ megasas_free_reply_fusion(struct megasas_instance *instance) {
> fusion->reply_frames_desc[0],
> fusion->reply_frames_desc_phys[0]);
>
> - if (fusion->reply_frames_desc_pool)
> - dma_pool_destroy(fusion->reply_frames_desc_pool);
> + dma_pool_destroy(fusion->reply_frames_desc_pool);
>
> }
>
> @@ -1627,8 +1624,7 @@ static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance)
> fusion->ioc_init_cmd->frame,
> fusion->ioc_init_cmd->frame_phys_addr);
>
> - if (fusion->ioc_init_cmd)
> - kfree(fusion->ioc_init_cmd);
> + kfree(fusion->ioc_init_cmd);
> }
>
> /**
> --
> 2.19.1
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Cocci spatch "ifnullfree" - v4.20-rc4
@ 2018-12-02 20:52 Thomas Meyer
2018-12-02 20:52 ` [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed Thomas Meyer
0 siblings, 1 reply; 6+ messages in thread
From: Thomas Meyer @ 2018-12-02 20:52 UTC (permalink / raw)
To: linux-kernel
NULL check before some freeing functions is not needed.
Found by coccinelle spatch "free/ifnullfree.cocci"
Run against version v4.20-rc4
P.S. If you find this email unwanted, set up a procmail rule junking on
the header:
X-Patch: Cocci
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed.
2018-12-02 20:52 Cocci spatch "ifnullfree" - v4.20-rc4 Thomas Meyer
@ 2018-12-02 20:52 ` Thomas Meyer
2018-12-03 6:40 ` Sumit Saxena
2018-12-08 2:40 ` Martin K. Petersen
0 siblings, 2 replies; 6+ messages in thread
From: Thomas Meyer @ 2018-12-02 20:52 UTC (permalink / raw)
To: kashyap.desai, sumit.saxena, shivasharan.srikanteshwara, jejb,
martin.petersen, megaraidlinux.pdl, linux-scsi, linux-kernel
NULL check before some freeing functions is not needed.
Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
---
diff -u -p a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
--- a/drivers/scsi/megaraid/megaraid_mbox.c
+++ b/drivers/scsi/megaraid/megaraid_mbox.c
@@ -1243,8 +1243,7 @@ megaraid_mbox_teardown_dma_pools(adapter
dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
sg_pci_blk[i].dma_addr);
}
- if (raid_dev->sg_pool_handle)
- dma_pool_destroy(raid_dev->sg_pool_handle);
+ dma_pool_destroy(raid_dev->sg_pool_handle);
epthru_pci_blk = raid_dev->epthru_pool;
@@ -1252,8 +1251,7 @@ megaraid_mbox_teardown_dma_pools(adapter
dma_pool_free(raid_dev->epthru_pool_handle,
epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
}
- if (raid_dev->epthru_pool_handle)
- dma_pool_destroy(raid_dev->epthru_pool_handle);
+ dma_pool_destroy(raid_dev->epthru_pool_handle);
mbox_pci_blk = raid_dev->mbox_pool;
@@ -1261,8 +1259,7 @@ megaraid_mbox_teardown_dma_pools(adapter
dma_pool_free(raid_dev->mbox_pool_handle,
mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
}
- if (raid_dev->mbox_pool_handle)
- dma_pool_destroy(raid_dev->mbox_pool_handle);
+ dma_pool_destroy(raid_dev->mbox_pool_handle);
return;
}
diff -u -p a/drivers/scsi/megaraid/megaraid_mm.c b/drivers/scsi/megaraid/megaraid_mm.c
--- a/drivers/scsi/megaraid/megaraid_mm.c
+++ b/drivers/scsi/megaraid/megaraid_mm.c
@@ -1017,8 +1017,7 @@ memalloc_error:
kfree(adapter->kioc_list);
kfree(adapter->mbox_list);
- if (adapter->pthru_dma_pool)
- dma_pool_destroy(adapter->pthru_dma_pool);
+ dma_pool_destroy(adapter->pthru_dma_pool);
kfree(adapter);
diff -u -p a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -807,10 +807,8 @@ megasas_free_rdpq_fusion(struct megasas_
}
- if (fusion->reply_frames_desc_pool)
- dma_pool_destroy(fusion->reply_frames_desc_pool);
- if (fusion->reply_frames_desc_pool_align)
- dma_pool_destroy(fusion->reply_frames_desc_pool_align);
+ dma_pool_destroy(fusion->reply_frames_desc_pool);
+ dma_pool_destroy(fusion->reply_frames_desc_pool_align);
if (fusion->rdpq_virt)
dma_free_coherent(&instance->pdev->dev,
@@ -830,8 +828,7 @@ megasas_free_reply_fusion(struct megasas
fusion->reply_frames_desc[0],
fusion->reply_frames_desc_phys[0]);
- if (fusion->reply_frames_desc_pool)
- dma_pool_destroy(fusion->reply_frames_desc_pool);
+ dma_pool_destroy(fusion->reply_frames_desc_pool);
}
@@ -1627,8 +1624,7 @@ static inline void megasas_free_ioc_init
fusion->ioc_init_cmd->frame,
fusion->ioc_init_cmd->frame_phys_addr);
- if (fusion->ioc_init_cmd)
- kfree(fusion->ioc_init_cmd);
+ kfree(fusion->ioc_init_cmd);
}
/**
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed.
2018-12-02 20:52 ` [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed Thomas Meyer
@ 2018-12-03 6:40 ` Sumit Saxena
2018-12-08 2:40 ` Martin K. Petersen
1 sibling, 0 replies; 6+ messages in thread
From: Sumit Saxena @ 2018-12-03 6:40 UTC (permalink / raw)
To: thomas
Cc: Kashyap Desai, Shivasharan Srikanteshwara, James E. J. Bottomley,
Martin K. Petersen, megaraidlinux.pdl, Linux SCSI List, LKML
On Mon, Dec 3, 2018 at 2:25 AM Thomas Meyer <thomas@m3y3r.de> wrote:
>
> NULL check before some freeing functions is not needed.
>
> Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Acked-by: Sumit Saxena <sumit.saxena@broadcom.com>
> ---
>
> diff -u -p a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
> --- a/drivers/scsi/megaraid/megaraid_mbox.c
> +++ b/drivers/scsi/megaraid/megaraid_mbox.c
> @@ -1243,8 +1243,7 @@ megaraid_mbox_teardown_dma_pools(adapter
> dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
> sg_pci_blk[i].dma_addr);
> }
> - if (raid_dev->sg_pool_handle)
> - dma_pool_destroy(raid_dev->sg_pool_handle);
> + dma_pool_destroy(raid_dev->sg_pool_handle);
>
>
> epthru_pci_blk = raid_dev->epthru_pool;
> @@ -1252,8 +1251,7 @@ megaraid_mbox_teardown_dma_pools(adapter
> dma_pool_free(raid_dev->epthru_pool_handle,
> epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
> }
> - if (raid_dev->epthru_pool_handle)
> - dma_pool_destroy(raid_dev->epthru_pool_handle);
> + dma_pool_destroy(raid_dev->epthru_pool_handle);
>
>
> mbox_pci_blk = raid_dev->mbox_pool;
> @@ -1261,8 +1259,7 @@ megaraid_mbox_teardown_dma_pools(adapter
> dma_pool_free(raid_dev->mbox_pool_handle,
> mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
> }
> - if (raid_dev->mbox_pool_handle)
> - dma_pool_destroy(raid_dev->mbox_pool_handle);
> + dma_pool_destroy(raid_dev->mbox_pool_handle);
>
> return;
> }
> diff -u -p a/drivers/scsi/megaraid/megaraid_mm.c b/drivers/scsi/megaraid/megaraid_mm.c
> --- a/drivers/scsi/megaraid/megaraid_mm.c
> +++ b/drivers/scsi/megaraid/megaraid_mm.c
> @@ -1017,8 +1017,7 @@ memalloc_error:
> kfree(adapter->kioc_list);
> kfree(adapter->mbox_list);
>
> - if (adapter->pthru_dma_pool)
> - dma_pool_destroy(adapter->pthru_dma_pool);
> + dma_pool_destroy(adapter->pthru_dma_pool);
>
> kfree(adapter);
>
> diff -u -p a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
> --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
> +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
> @@ -807,10 +807,8 @@ megasas_free_rdpq_fusion(struct megasas_
>
> }
>
> - if (fusion->reply_frames_desc_pool)
> - dma_pool_destroy(fusion->reply_frames_desc_pool);
> - if (fusion->reply_frames_desc_pool_align)
> - dma_pool_destroy(fusion->reply_frames_desc_pool_align);
> + dma_pool_destroy(fusion->reply_frames_desc_pool);
> + dma_pool_destroy(fusion->reply_frames_desc_pool_align);
>
> if (fusion->rdpq_virt)
> dma_free_coherent(&instance->pdev->dev,
> @@ -830,8 +828,7 @@ megasas_free_reply_fusion(struct megasas
> fusion->reply_frames_desc[0],
> fusion->reply_frames_desc_phys[0]);
>
> - if (fusion->reply_frames_desc_pool)
> - dma_pool_destroy(fusion->reply_frames_desc_pool);
> + dma_pool_destroy(fusion->reply_frames_desc_pool);
>
> }
>
> @@ -1627,8 +1624,7 @@ static inline void megasas_free_ioc_init
> fusion->ioc_init_cmd->frame,
> fusion->ioc_init_cmd->frame_phys_addr);
>
> - if (fusion->ioc_init_cmd)
> - kfree(fusion->ioc_init_cmd);
> + kfree(fusion->ioc_init_cmd);
> }
>
> /**
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed.
@ 2018-12-03 6:40 ` Sumit Saxena
0 siblings, 0 replies; 6+ messages in thread
From: Sumit Saxena @ 2018-12-03 6:40 UTC (permalink / raw)
To: thomas
Cc: Kashyap Desai, Shivasharan Srikanteshwara, James E. J. Bottomley,
Martin K. Petersen, megaraidlinux.pdl, Linux SCSI List, LKML
On Mon, Dec 3, 2018 at 2:25 AM Thomas Meyer <thomas@m3y3r.de> wrote:
>
> NULL check before some freeing functions is not needed.
>
> Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Acked-by: Sumit Saxena <sumit.saxena@broadcom.com>
> ---
>
> diff -u -p a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
> --- a/drivers/scsi/megaraid/megaraid_mbox.c
> +++ b/drivers/scsi/megaraid/megaraid_mbox.c
> @@ -1243,8 +1243,7 @@ megaraid_mbox_teardown_dma_pools(adapter
> dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
> sg_pci_blk[i].dma_addr);
> }
> - if (raid_dev->sg_pool_handle)
> - dma_pool_destroy(raid_dev->sg_pool_handle);
> + dma_pool_destroy(raid_dev->sg_pool_handle);
>
>
> epthru_pci_blk = raid_dev->epthru_pool;
> @@ -1252,8 +1251,7 @@ megaraid_mbox_teardown_dma_pools(adapter
> dma_pool_free(raid_dev->epthru_pool_handle,
> epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
> }
> - if (raid_dev->epthru_pool_handle)
> - dma_pool_destroy(raid_dev->epthru_pool_handle);
> + dma_pool_destroy(raid_dev->epthru_pool_handle);
>
>
> mbox_pci_blk = raid_dev->mbox_pool;
> @@ -1261,8 +1259,7 @@ megaraid_mbox_teardown_dma_pools(adapter
> dma_pool_free(raid_dev->mbox_pool_handle,
> mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
> }
> - if (raid_dev->mbox_pool_handle)
> - dma_pool_destroy(raid_dev->mbox_pool_handle);
> + dma_pool_destroy(raid_dev->mbox_pool_handle);
>
> return;
> }
> diff -u -p a/drivers/scsi/megaraid/megaraid_mm.c b/drivers/scsi/megaraid/megaraid_mm.c
> --- a/drivers/scsi/megaraid/megaraid_mm.c
> +++ b/drivers/scsi/megaraid/megaraid_mm.c
> @@ -1017,8 +1017,7 @@ memalloc_error:
> kfree(adapter->kioc_list);
> kfree(adapter->mbox_list);
>
> - if (adapter->pthru_dma_pool)
> - dma_pool_destroy(adapter->pthru_dma_pool);
> + dma_pool_destroy(adapter->pthru_dma_pool);
>
> kfree(adapter);
>
> diff -u -p a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
> --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
> +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
> @@ -807,10 +807,8 @@ megasas_free_rdpq_fusion(struct megasas_
>
> }
>
> - if (fusion->reply_frames_desc_pool)
> - dma_pool_destroy(fusion->reply_frames_desc_pool);
> - if (fusion->reply_frames_desc_pool_align)
> - dma_pool_destroy(fusion->reply_frames_desc_pool_align);
> + dma_pool_destroy(fusion->reply_frames_desc_pool);
> + dma_pool_destroy(fusion->reply_frames_desc_pool_align);
>
> if (fusion->rdpq_virt)
> dma_free_coherent(&instance->pdev->dev,
> @@ -830,8 +828,7 @@ megasas_free_reply_fusion(struct megasas
> fusion->reply_frames_desc[0],
> fusion->reply_frames_desc_phys[0]);
>
> - if (fusion->reply_frames_desc_pool)
> - dma_pool_destroy(fusion->reply_frames_desc_pool);
> + dma_pool_destroy(fusion->reply_frames_desc_pool);
>
> }
>
> @@ -1627,8 +1624,7 @@ static inline void megasas_free_ioc_init
> fusion->ioc_init_cmd->frame,
> fusion->ioc_init_cmd->frame_phys_addr);
>
> - if (fusion->ioc_init_cmd)
> - kfree(fusion->ioc_init_cmd);
> + kfree(fusion->ioc_init_cmd);
> }
>
> /**
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed.
2018-12-02 20:52 ` [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed Thomas Meyer
2018-12-03 6:40 ` Sumit Saxena
@ 2018-12-08 2:40 ` Martin K. Petersen
1 sibling, 0 replies; 6+ messages in thread
From: Martin K. Petersen @ 2018-12-08 2:40 UTC (permalink / raw)
To: Thomas Meyer
Cc: kashyap.desai, sumit.saxena, shivasharan.srikanteshwara, jejb,
martin.petersen, megaraidlinux.pdl, linux-scsi, linux-kernel
Thomas,
> NULL check before some freeing functions is not needed.
Applied to 4.21/scsi-queue.
--
Martin K. Petersen Oracle Linux Engineering
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2018-12-08 2:41 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-11-28 8:05 [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed Wen Yang
2018-12-03 6:43 ` Sumit Saxena
2018-12-02 20:52 Cocci spatch "ifnullfree" - v4.20-rc4 Thomas Meyer
2018-12-02 20:52 ` [PATCH] scsi: megaraid_sas: NULL check before some freeing functions is not needed Thomas Meyer
2018-12-03 6:40 ` Sumit Saxena
2018-12-03 6:40 ` Sumit Saxena
2018-12-08 2:40 ` Martin K. Petersen
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