linux-kernel - [PATCH 5.17 077/158] net: ipa: record proper RX transaction count

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Date:   Mon, 23 May 2022 19:03:54 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alex Elder <elder@...aro.org>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.17 077/158] net: ipa: record proper RX transaction count

From: Alex Elder <elder@...aro.org>

[ Upstream commit d8290cbe1111105f92f0c8ab455bec8bf98d0630 ]

Each time we are notified that some number of transactions on an RX
channel has completed, we record the number of bytes that have been
transferred since the previous notification.  We also track the
number of transactions completed, but that is not currently being
calculated correctly; we're currently counting the number of such
notifications, but each notification can represent many transaction
completions.  Fix this.

Fixes: 650d1603825d8 ("soc: qcom: ipa: the generic software interface")
Signed-off-by: Alex Elder <elder@...aro.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ipa/gsi.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c
index bc981043cc80..a701178a1d13 100644
--- a/drivers/net/ipa/gsi.c
+++ b/drivers/net/ipa/gsi.c
@@ -1367,9 +1367,10 @@ static void gsi_evt_ring_rx_update(struct gsi_evt_ring *evt_ring, u32 index)
 	struct gsi_event *event_done;
 	struct gsi_event *event;
 	struct gsi_trans *trans;
+	u32 trans_count = 0;
 	u32 byte_count = 0;
-	u32 old_index;
 	u32 event_avail;
+	u32 old_index;
 
 	trans_info = &channel->trans_info;
 
@@ -1390,6 +1391,7 @@ static void gsi_evt_ring_rx_update(struct gsi_evt_ring *evt_ring, u32 index)
 	do {
 		trans->len = __le16_to_cpu(event->len);
 		byte_count += trans->len;
+		trans_count++;
 
 		/* Move on to the next event and transaction */
 		if (--event_avail)
@@ -1401,7 +1403,7 @@ static void gsi_evt_ring_rx_update(struct gsi_evt_ring *evt_ring, u32 index)
 
 	/* We record RX bytes when they are received */
 	channel->byte_count += byte_count;
-	channel->trans_count++;
+	channel->trans_count += trans_count;
 }
 
 /* Initialize a ring, including allocating DMA memory for its entries */
-- 
2.35.1