netdev - Re: [PATCH net-next] liquidio: Remove unneeded cast from memory allocation

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Message-ID: <4299fe666c93018a9a047575e5d68a0bb4dd269f.camel@perches.com>
Date:   Tue, 28 Jul 2020 08:54:48 -0700
From:   Joe Perches <joe@...ches.com>
To:     "wanghai (M)" <wanghai38@...wei.com>, dchickles@...vell.com,
        sburla@...vell.com, fmanlunas@...vell.com, davem@...emloft.net,
        kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] liquidio: Remove unneeded cast from memory
 allocation

On Tue, 2020-07-28 at 21:38 +0800, wanghai (M) wrote:
> Thanks for your explanation. I got it.
> 
> Can it be modified like this?
[]
> +++ b/drivers/net/ethernet/cavium/liquidio/octeon_device.c
> @@ -1152,11 +1152,8 @@ octeon_register_dispatch_fn(struct octeon_device 
> *oct,
> 
>                  dev_dbg(&oct->pci_dev->dev,
>                          "Adding opcode to dispatch list linked list\n");
> -               dispatch = (struct octeon_dispatch *)
> -                          vmalloc(sizeof(struct octeon_dispatch));
> +               dispatch = kmalloc(sizeof(struct octeon_dispatch), 
> GFP_KERNEL);
>                  if (!dispatch) {
> -                       dev_err(&oct->pci_dev->dev,
> -                               "No memory to add dispatch function\n");
>                          return 1;
>                  }
>                  dispatch->opcode = combined_opcode;

Yes, but the free also needs to be changed.

I think it's:
---
 drivers/net/ethernet/cavium/liquidio/octeon_device.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_device.c b/drivers/net/ethernet/cavium/liquidio/octeon_device.c
index 934115d18488..4ee4cb946e1d 100644
--- a/drivers/net/ethernet/cavium/liquidio/octeon_device.c
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_device.c
@@ -1056,7 +1056,7 @@ void octeon_delete_dispatch_list(struct octeon_device *oct)
 
 	list_for_each_safe(temp, tmp2, &freelist) {
 		list_del(temp);
-		vfree(temp);
+		kfree(temp);
 	}
 }
 
@@ -1152,13 +1152,10 @@ octeon_register_dispatch_fn(struct octeon_device *oct,
 
 		dev_dbg(&oct->pci_dev->dev,
 			"Adding opcode to dispatch list linked list\n");
-		dispatch = (struct octeon_dispatch *)
-			   vmalloc(sizeof(struct octeon_dispatch));
-		if (!dispatch) {
-			dev_err(&oct->pci_dev->dev,
-				"No memory to add dispatch function\n");
+		dispatch = kmalloc(sizeof(struct octeon_dispatch), GFP_KERNEL);
+		if (!dispatch)
 			return 1;
-		}
+
 		dispatch->opcode = combined_opcode;
 		dispatch->dispatch_fn = fn;
 		dispatch->arg = fn_arg;