linux-kernel - [PATCH net 1/2] net: ipa: set DMA length in gsi_trans_cmd

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Message-Id: <20200507191404.31626-2-elder@linaro.org>
Date:   Thu,  7 May 2020 14:14:03 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net
Cc:     evgreen@...omium.org.net, subashab@...eaurora.org,
        cpratapa@...eaurora.org, bjorn.andersson@...aro.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net 1/2] net: ipa: set DMA length in gsi_trans_cmd_add()

When a command gets added to a transaction for the AP->command
channel we set the DMA address of its scatterlist entry, but not
its DMA length.  Fix this bug.

Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/net/ipa/gsi_trans.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ipa/gsi_trans.c b/drivers/net/ipa/gsi_trans.c
index 2fd21d75367d..bdbfeed359db 100644
--- a/drivers/net/ipa/gsi_trans.c
+++ b/drivers/net/ipa/gsi_trans.c
@@ -399,13 +399,14 @@ void gsi_trans_cmd_add(struct gsi_trans *trans, void *buf, u32 size,
 	/* assert(which < trans->tre_count); */
 
 	/* Set the page information for the buffer.  We also need to fill in
-	 * the DMA address for the buffer (something dma_map_sg() normally
-	 * does).
+	 * the DMA address and length for the buffer (something dma_map_sg()
+	 * normally does).
 	 */
 	sg = &trans->sgl[which];
 
 	sg_set_buf(sg, buf, size);
 	sg_dma_address(sg) = addr;
+	sg_dma_len(sg) = sg->length;
 
 	info = &trans->info[which];
 	info->opcode = opcode;
-- 
2.20.1