can: rcar_canfd: Enhance multi_channel_irqs handling

Currently multi_channel_irqs has only 2 channels. But RZ/G3E has six
channels. Enhance multi_channel_irqs handling to support more than two
channels.

Reviewed-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Vincent Mailhol <[email protected]>
Signed-off-by: Biju Das <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Marc Kleine-Budde <[email protected]>

Author: bijudas

drivers/net/can/rcar/rcar_canfd.c

@@ -1857,16 +1857,19 @@ static int rcar_canfd_channel_probe(struct rcar_canfd_global *gpriv, u32 ch,
 
 	if (info->multi_channel_irqs) {
 		char *irq_name;
+		char name[10];
 		int err_irq;
 		int tx_irq;
 
-		err_irq = platform_get_irq_byname(pdev, ch == 0 ? "ch0_err" : "ch1_err");
+		scnprintf(name, sizeof(name), "ch%u_err", ch);
+		err_irq = platform_get_irq_byname(pdev, name);
 		if (err_irq < 0) {
 			err = err_irq;
 			goto fail;
 		}
 
-		tx_irq = platform_get_irq_byname(pdev, ch == 0 ? "ch0_trx" : "ch1_trx");
+		scnprintf(name, sizeof(name), "ch%u_trx", ch);
+		tx_irq = platform_get_irq_byname(pdev, name);
 		if (tx_irq < 0) {
 			err = tx_irq;
 			goto fail;