net: ipa: mode register is TX only

The INIT_MODE endpoint configuration register is only valid for TX
endpoints.  Rather than writing a zero to that register for RX
endpoints, avoid writing the register at all.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ipa/ipa_endpoint.c

@@ -541,7 +541,7 @@ static void ipa_endpoint_init_mode(struct ipa_endpoint *endpoint)
 	u32 offset = IPA_REG_ENDP_INIT_MODE_N_OFFSET(endpoint->endpoint_id);
 	u32 val;
 
-	if (endpoint->toward_ipa && endpoint->data->dma_mode) {
+	if (endpoint->data->dma_mode) {
 		enum ipa_endpoint_name name = endpoint->data->dma_endpoint;
 		u32 dma_endpoint_id;
 
@@ -552,7 +552,7 @@ static void ipa_endpoint_init_mode(struct ipa_endpoint *endpoint)
 	} else {
 		val = u32_encode_bits(IPA_BASIC, MODE_FMASK);
 	}
-	/* Other bitfields unspecified (and 0) */
+	/* All other bits unspecified (and 0) */
 
 	iowrite32(val, endpoint->ipa->reg_virt + offset);
 }
@@ -1300,6 +1300,7 @@ static void ipa_endpoint_program(struct ipa_endpoint *endpoint)
 		ipa_endpoint_init_aggr(endpoint);
 		ipa_endpoint_init_deaggr(endpoint);
 		ipa_endpoint_init_seq(endpoint);
+		ipa_endpoint_init_mode(endpoint);
 	} else {
 		if (endpoint->ipa->version == IPA_VERSION_3_5_1)
 			(void)ipa_endpoint_program_suspend(endpoint, false);
@@ -1309,7 +1310,6 @@ static void ipa_endpoint_program(struct ipa_endpoint *endpoint)
 	}
 	ipa_endpoint_init_cfg(endpoint);
 	ipa_endpoint_init_hdr(endpoint);
-	ipa_endpoint_init_mode(endpoint);
 	ipa_endpoint_status(endpoint);
 }