1 files changed, 6 insertions, 74 deletions

diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index dec1dc8618ed..82066a223a67 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -32,14 +32,9 @@
 /* The amount of RX buffer space consumed by standard skb overhead */
 #define IPA_RX_BUFFER_OVERHEAD	(PAGE_SIZE - SKB_MAX_ORDER(NET_SKB_PAD, 0))
 
-#define IPA_ENDPOINT_STOP_RX_RETRIES		10
-#define IPA_ENDPOINT_STOP_RX_SIZE		1	/* bytes */
-
 #define IPA_ENDPOINT_RESET_AGGR_RETRY_MAX	3
 #define IPA_AGGR_TIME_LIMIT_DEFAULT		1000	/* microseconds */
 
-#define ENDPOINT_STOP_DMA_TIMEOUT		15	/* milliseconds */
-
 /** enum ipa_status_opcode - status element opcode hardware values */
 enum ipa_status_opcode {
 	IPA_STATUS_OPCODE_PACKET		= 0x01,
@@ -1219,7 +1214,7 @@ static int ipa_endpoint_reset_rx_aggr(struct ipa_endpoint *endpoint)
 
 	gsi_trans_read_byte_done(gsi, endpoint->channel_id);
 
-	ret = ipa_endpoint_stop(endpoint);
+	ret = gsi_channel_stop(gsi, endpoint->channel_id);
 	if (ret)
 		goto out_suspend_again;
 
@@ -1236,7 +1231,7 @@ static int ipa_endpoint_reset_rx_aggr(struct ipa_endpoint *endpoint)
 	goto out_suspend_again;
 
 err_endpoint_stop:
-	ipa_endpoint_stop(endpoint);
+	(void)gsi_channel_stop(gsi, endpoint->channel_id);
 out_suspend_again:
 	if (suspended)
 		(void)ipa_endpoint_program_suspend(endpoint, true);
@@ -1274,70 +1269,6 @@ static void ipa_endpoint_reset(struct ipa_endpoint *endpoint)
 			ret, endpoint->channel_id, endpoint->endpoint_id);
 }
 
-static int ipa_endpoint_stop_rx_dma(struct ipa *ipa)
-{
-	u16 size = IPA_ENDPOINT_STOP_RX_SIZE;
-	struct gsi_trans *trans;
-	dma_addr_t addr;
-	int ret;
-
-	trans = ipa_cmd_trans_alloc(ipa, 1);
-	if (!trans) {
-		dev_err(&ipa->pdev->dev,
-			"no transaction for RX endpoint STOP workaround\n");
-		return -EBUSY;
-	}
-
-	/* Read into the highest part of the zero memory area */
-	addr = ipa->zero_addr + ipa->zero_size - size;
-
-	ipa_cmd_dma_task_32b_addr_add(trans, size, addr, false);
-
-	ret = gsi_trans_commit_wait_timeout(trans, ENDPOINT_STOP_DMA_TIMEOUT);
-	if (ret)
-		gsi_trans_free(trans);
-
-	return ret;
-}
-
-/**
- * ipa_endpoint_stop() - Stops a GSI channel in IPA
- * @client:	Client whose endpoint should be stopped
- *
- * This function implements the sequence to stop a GSI channel
- * in IPA. This function returns when the channel is is STOP state.
- *
- * Return value: 0 on success, negative otherwise
- */
-int ipa_endpoint_stop(struct ipa_endpoint *endpoint)
-{
-	u32 retries = endpoint->toward_ipa ? 0 : IPA_ENDPOINT_STOP_RX_RETRIES;
-	int ret;
-
-	do {
-		struct ipa *ipa = endpoint->ipa;
-		struct gsi *gsi = &ipa->gsi;
-
-		ret = gsi_channel_stop(gsi, endpoint->channel_id);
-		if (ret != -EAGAIN)
-			break;
-
-		if (endpoint->toward_ipa)
-			continue;
-
-		/* For IPA v3.5.1, send a DMA read task and check again */
-		if (ipa->version == IPA_VERSION_3_5_1) {
-			ret = ipa_endpoint_stop_rx_dma(ipa);
-			if (ret)
-				break;
-		}
-
-		msleep(1);
-	} while (retries--);
-
-	return retries ? ret : -EIO;
-}
-
 static void ipa_endpoint_program(struct ipa_endpoint *endpoint)
 {
 	if (endpoint->toward_ipa) {
@@ -1390,12 +1321,13 @@ void ipa_endpoint_disable_one(struct ipa_endpoint *endpoint)
 {
 	u32 mask = BIT(endpoint->endpoint_id);
 	struct ipa *ipa = endpoint->ipa;
+	struct gsi *gsi = &ipa->gsi;
 	int ret;
 
-	if (!(endpoint->ipa->enabled & mask))
+	if (!(ipa->enabled & mask))
 		return;
 
-	endpoint->ipa->enabled ^= mask;
+	ipa->enabled ^= mask;
 
 	if (!endpoint->toward_ipa) {
 		ipa_endpoint_replenish_disable(endpoint);
@@ -1404,7 +1336,7 @@ void ipa_endpoint_disable_one(struct ipa_endpoint *endpoint)
 	}
 
 	/* Note that if stop fails, the channel's state is not well-defined */
-	ret = ipa_endpoint_stop(endpoint);
+	ret = gsi_channel_stop(gsi, endpoint->channel_id);
 	if (ret)
 		dev_err(&ipa->pdev->dev,
 			"error %d attempting to stop endpoint %u\n", ret,