[PATCH net-next] nfp: flower: Remove usage of the deprecated ida_simple_xx() API

[PATCH net-next] nfp: flower: Remove usage of the deprecated ida_simple_xx() API

[Christophe JAILLET]

ida_alloc() and ida_free() should be preferred to the deprecated
ida_simple_get() and ida_simple_remove().

This is less verbose.

Note that the upper bound of ida_alloc_range() is inclusive while the one
of ida_simple_get() was exclusive.
So NFP_FL_LAG_GROUP_MAX has been decreased by 1. It now better watch the
comment stating that "1 to 31 are valid".

The only other user of NFP_FL_LAG_GROUP_MAX has been updated accordingly in
nfp_fl_lag_put_unprocessed().

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 .../net/ethernet/netronome/nfp/flower/lag_conf.c    | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c b/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c
index 88d6d992e7d0..361d7c495e2d 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/lag_conf.c
@@ -76,7 +76,7 @@ struct nfp_fl_lag_group {
 /* Use this ID with zero members to ack a batch config */
 #define NFP_FL_LAG_SYNC_ID		0
 #define NFP_FL_LAG_GROUP_MIN		1 /* ID 0 reserved */
-#define NFP_FL_LAG_GROUP_MAX		32 /* IDs 1 to 31 are valid */
+#define NFP_FL_LAG_GROUP_MAX		31 /* IDs 1 to 31 are valid */
 
 /* wait for more config */
 #define NFP_FL_LAG_DELAY		(msecs_to_jiffies(2))
@@ -111,8 +111,8 @@ nfp_fl_lag_group_create(struct nfp_fl_lag *lag, struct net_device *master)
 
 	priv = container_of(lag, struct nfp_flower_priv, nfp_lag);
 
-	id = ida_simple_get(&lag->ida_handle, NFP_FL_LAG_GROUP_MIN,
-			    NFP_FL_LAG_GROUP_MAX, GFP_KERNEL);
+	id = ida_alloc_range(&lag->ida_handle, NFP_FL_LAG_GROUP_MIN,
+			     NFP_FL_LAG_GROUP_MAX, GFP_KERNEL);
 	if (id < 0) {
 		nfp_flower_cmsg_warn(priv->app,
 				     "No more bonding groups available\n");
@@ -121,7 +121,7 @@ nfp_fl_lag_group_create(struct nfp_fl_lag *lag, struct net_device *master)
 
 	group = kmalloc(sizeof(*group), GFP_KERNEL);
 	if (!group) {
-		ida_simple_remove(&lag->ida_handle, id);
+		ida_free(&lag->ida_handle, id);
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -328,8 +328,7 @@ static void nfp_fl_lag_do_work(struct work_struct *work)
 			}
 
 			if (entry->to_destroy) {
-				ida_simple_remove(&lag->ida_handle,
-						  entry->group_id);
+				ida_free(&lag->ida_handle, entry->group_id);
 				list_del(&entry->list);
 				kfree(entry);
 			}
@@ -415,7 +414,7 @@ nfp_fl_lag_put_unprocessed(struct nfp_fl_lag *lag, struct sk_buff *skb)
 	struct nfp_flower_cmsg_lag_config *cmsg_payload;
 
 	cmsg_payload = nfp_flower_cmsg_get_data(skb);
-	if (be32_to_cpu(cmsg_payload->group_id) >= NFP_FL_LAG_GROUP_MAX)
+	if (be32_to_cpu(cmsg_payload->group_id) > NFP_FL_LAG_GROUP_MAX)
 		return -EINVAL;
 
 	/* Drop cmsg retrans if storage limit is exceeded to prevent
-- 
2.34.1

Re: [PATCH net-next] nfp: flower: Remove usage of the deprecated ida_simple_xx() API

[Simon Horman]

On Fri, Jan 05, 2024 at 10:10:37AM +0100, Christophe JAILLET wrote:
> ida_alloc() and ida_free() should be preferred to the deprecated
> ida_simple_get() and ida_simple_remove().
> 
> This is less verbose.
> 
> Note that the upper bound of ida_alloc_range() is inclusive while the one
> of ida_simple_get() was exclusive.
> So NFP_FL_LAG_GROUP_MAX has been decreased by 1. It now better watch the
> comment stating that "1 to 31 are valid".
> 
> The only other user of NFP_FL_LAG_GROUP_MAX has been updated accordingly in
> nfp_fl_lag_put_unprocessed().
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

Reviewed-by: Simon Horman <horms@kernel.org>

Re: [PATCH net-next] nfp: flower: Remove usage of the deprecated ida_simple_xx() API

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (main)
by David S. Miller <davem@davemloft.net>:

On Fri,  5 Jan 2024 10:10:37 +0100 you wrote:
> ida_alloc() and ida_free() should be preferred to the deprecated
> ida_simple_get() and ida_simple_remove().
> 
> This is less verbose.
> 
> Note that the upper bound of ida_alloc_range() is inclusive while the one
> of ida_simple_get() was exclusive.
> So NFP_FL_LAG_GROUP_MAX has been decreased by 1. It now better watch the
> comment stating that "1 to 31 are valid".
> 
> [...]

Here is the summary with links:
  - [net-next] nfp: flower: Remove usage of the deprecated ida_simple_xx() API
    https://git.kernel.org/netdev/net-next/c/363096a27f90

You are awesome, thank you!
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