net: ipa: Remove ipa_endpoint_stop{,_rx_dma} again

When building arm64 allyesconfig:

drivers/net/ipa/ipa_endpoint.c: In function 'ipa_endpoint_stop_rx_dma':
drivers/net/ipa/ipa_endpoint.c:1274:13: error: 'IPA_ENDPOINT_STOP_RX_SIZE' undeclared (first use in this function)
drivers/net/ipa/ipa_endpoint.c:1274:13: note: each undeclared identifier is reported only once for each function it appears in
drivers/net/ipa/ipa_endpoint.c:1289:2: error: implicit declaration of function 'ipa_cmd_dma_task_32b_addr_add' [-Werror=implicit-function-declaration]
drivers/net/ipa/ipa_endpoint.c:1291:45: error: 'ENDPOINT_STOP_DMA_TIMEOUT' undeclared (first use in this function)
drivers/net/ipa/ipa_endpoint.c: In function 'ipa_endpoint_stop':
drivers/net/ipa/ipa_endpoint.c:1309:16: error: 'IPA_ENDPOINT_STOP_RX_RETRIES' undeclared (first use in this function)

These functions were removed in a series, merged in as
commit 33395f4a ("Merge branch 'net-ipa-kill-endpoint-stop-workaround'").

Remove them again so that the build works properly.

Fixes: 3793faad ("Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net")
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ipa/ipa_endpoint.c

@@ -1269,67 +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 = 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 || endpoint->toward_ipa)
-			break;
-
-		/* 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) {