add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/net/dsa/vitesse-vsc73xx-core.c
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@@ -1025,17 +1025,17 @@
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 	struct vsc73xx *vsc = ds->priv;
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 	return vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port,
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-			     VSC73XX_MAXLEN, new_mtu);
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+			     VSC73XX_MAXLEN, new_mtu + ETH_HLEN + ETH_FCS_LEN);
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 }
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 /* According to application not "VSC7398 Jumbo Frames" setting
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- * up the MTU to 9.6 KB does not affect the performance on standard
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+ * up the frame size to 9.6 KB does not affect the performance on standard
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  * frames. It is clear from the application note that
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  * "9.6 kilobytes" == 9600 bytes.
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  */
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 static int vsc73xx_get_max_mtu(struct dsa_switch *ds, int port)
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 {
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-	return 9600;
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+	return 9600 - ETH_HLEN - ETH_FCS_LEN;
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 }
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 static const struct dsa_switch_ops vsc73xx_ds_ops = {