enable docker ppp

hc

2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/drivers/usb/musb/musb_gadget.c
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@@ -760,6 +760,9 @@
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 			musb_writew(epio, MUSB_RXCSR, csr);
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 buffer_aint_mapped:
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+			fifo_count = min_t(unsigned int,
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+					request->length - request->actual,
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+					(unsigned int)fifo_count);
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 			musb_read_fifo(musb_ep->hw_ep, fifo_count, (u8 *)
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 					(request->buf + request->actual));
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 			request->actual += fifo_count;
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@@ -1085,7 +1088,6 @@
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 	u8		epnum;
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 	struct musb_ep	*musb_ep;
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 	void __iomem	*epio;
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-	int		status = 0;
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 	musb_ep = to_musb_ep(ep);
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 	musb = musb_ep->musb;
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@@ -1118,7 +1120,7 @@
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 	musb_dbg(musb, "%s", musb_ep->end_point.name);
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-	return status;
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+	return 0;
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 }
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 /*
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@@ -1318,7 +1320,7 @@
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 }
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 /*
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- * Set or clear the halt bit of an endpoint. A halted enpoint won't tx/rx any
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+ * Set or clear the halt bit of an endpoint. A halted endpoint won't tx/rx any
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  * data but will queue requests.
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  *
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  * exported to ep0 code