netdev - [PATCH] mac802154_hwsim: allow users to specify the number of simulated radios dynamically instead of the previously hardcoded value of 2

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Message-ID: <20250610105338.8166-1-ramonreisfontes@gmail.com>
Date: Tue, 10 Jun 2025 07:53:38 -0300
From: Ramon Fontes <ramonreisfontes@...il.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: linux-wpan@...r.kernel.org,
	alex.aring@...il.com,
	miquel.raynal@...tlin.com,
	netdev@...r.kernel.org,
	Ramon Fontes <ramonreisfontes@...il.com>
Subject: [PATCH] mac802154_hwsim: allow users to specify the number of simulated radios dynamically instead of the previously hardcoded value of 2

Add a module parameter radios to allow users to configure the number
of virtual radios created by mac802154_hwsim at module load time.
This replaces the previously hardcoded value of 2.

* Added a new module parameter radios
* Modified the loop in hwsim_probe()
* Updated log message in hwsim_probe()

Signed-off-by: Ramon Fontes <ramonreisfontes@...il.com>
---
 drivers/net/ieee802154/mac802154_hwsim.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c
index 1cab20b5a..bf6554669 100644
--- a/drivers/net/ieee802154/mac802154_hwsim.c
+++ b/drivers/net/ieee802154/mac802154_hwsim.c
@@ -27,6 +27,10 @@
 MODULE_DESCRIPTION("Software simulator of IEEE 802.15.4 radio(s) for mac802154");
 MODULE_LICENSE("GPL");
 
+static unsigned int radios = 2;
+module_param(radios, int, 0444);
+MODULE_PARM_DESC(radios, "Number of simulated radios");
+
 static LIST_HEAD(hwsim_phys);
 static DEFINE_MUTEX(hwsim_phys_lock);
 
@@ -1016,15 +1020,16 @@ static void hwsim_del(struct hwsim_phy *phy)
 static int hwsim_probe(struct platform_device *pdev)
 {
 	struct hwsim_phy *phy, *tmp;
-	int err, i;
+	int err;
+	unsigned int i;
 
-	for (i = 0; i < 2; i++) {
+	for (i = 0; i < radios; i++) {
 		err = hwsim_add_one(NULL, &pdev->dev, true);
 		if (err < 0)
 			goto err_slave;
 	}
 
-	dev_info(&pdev->dev, "Added 2 mac802154 hwsim hardware radios\n");
+	dev_info(&pdev->dev, "Added %u mac802154 hwsim hardware radios\n", radios);
 	return 0;
 
 err_slave:
-- 
2.43.0