can: m_can: Use u32 for putidx

putidx is not an integer normally, it is an unsigned field used in
hardware registers. Use a u32 for it.

Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/all/20240207093220.2681425-9-msp@baylibre.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index b31df3e..1b62613 100644 (file)
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -486,7 +486,7 @@ static void m_can_clean(struct net_device *net)
        struct m_can_classdev *cdev = netdev_priv(net);
 
        if (cdev->tx_skb) {
-               int putidx = 0;
+               u32 putidx = 0;
 
                net->stats.tx_errors++;
                if (cdev->version > 30)
@@ -1695,12 +1695,12 @@ static int m_can_close(struct net_device *dev)
        return 0;
 }
 
-static int m_can_next_echo_skb_occupied(struct net_device *dev, int putidx)
+static int m_can_next_echo_skb_occupied(struct net_device *dev, u32 putidx)
 {
        struct m_can_classdev *cdev = netdev_priv(dev);
        /*get wrap around for loopback skb index */
        unsigned int wrap = cdev->can.echo_skb_max;
-       int next_idx;
+       u32 next_idx;
 
        /* calculate next index */
        next_idx = (++putidx >= wrap ? 0 : putidx);
@@ -1719,7 +1719,7 @@ static netdev_tx_t m_can_tx_handler(struct m_can_classdev *cdev)
        u32 cccr, fdflags;
        u32 txfqs;
        int err;
-       int putidx;
+       u32 putidx;
 
        cdev->tx_skb = NULL;