linux-kernel - [PATCH net-next v2 2/5] net: ipa: metadata

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Message-Id: <20200630133304.1331058-3-elder@linaro.org>
Date:   Tue, 30 Jun 2020 08:33:01 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     evgreen@...omium.org, subashab@...eaurora.org,
        cpratapa@...eaurora.org, bjorn.andersson@...aro.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next v2 2/5] net: ipa: metadata_mask register is RX only

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

Signed-off-by: Alex Elder <elder@...aro.org>
---
v2: The commented call to assert() that was added is now gone.

 drivers/net/ipa/ipa_endpoint.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index 31afe282f347..1babcfc79360 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -530,7 +530,7 @@ static void ipa_endpoint_init_hdr_metadata_mask(struct ipa_endpoint *endpoint)
 	offset = IPA_REG_ENDP_INIT_HDR_METADATA_MASK_N_OFFSET(endpoint_id);
 
 	/* Note that HDR_ENDIANNESS indicates big endian header fields */
-	if (!endpoint->toward_ipa && endpoint->data->qmap)
+	if (endpoint->data->qmap)
 		val = cpu_to_be32(IPA_ENDPOINT_QMAP_METADATA_MASK);
 
 	iowrite32(val, endpoint->ipa->reg_virt + offset);
@@ -1302,10 +1302,10 @@ static void ipa_endpoint_program(struct ipa_endpoint *endpoint)
 			(void)ipa_endpoint_program_suspend(endpoint, false);
 		ipa_endpoint_init_hdr_ext(endpoint);
 		ipa_endpoint_init_aggr(endpoint);
+		ipa_endpoint_init_hdr_metadata_mask(endpoint);
 	}
 	ipa_endpoint_init_cfg(endpoint);
 	ipa_endpoint_init_hdr(endpoint);
-	ipa_endpoint_init_hdr_metadata_mask(endpoint);
 	ipa_endpoint_init_mode(endpoint);
 	ipa_endpoint_status(endpoint);
 }
-- 
2.25.1