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authorDavid Howells <dhowells@redhat.com>2018-10-08 15:46:01 +0100
committerDavid Howells <dhowells@redhat.com>2018-10-08 15:55:20 +0100
commitc479d5f2c2e1ce609da08c075054440d97ddff52 (patch)
treeb51690957e1c646c7b9286dc085d85ceb4728e60 /net/rxrpc
parentbfd2821117a751763718f1b5e57216c0d9b19a49 (diff)
downloadlinux-stericsson-c479d5f2c2e1ce609da08c075054440d97ddff52.tar.gz
rxrpc: Don't check RXRPC_CALL_TX_LAST after calling rxrpc_rotate_tx_window()
We should only call the function to end a call's Tx phase if we rotated the marked-last packet out of the transmission buffer. Make rxrpc_rotate_tx_window() return an indication of whether it just rotated the packet marked as the last out of the transmit buffer, carrying the information out of the locked section in that function. We can then check the return value instead of examining RXRPC_CALL_TX_LAST. Fixes: 70790dbe3f66 ("rxrpc: Pass the last Tx packet marker in the annotation buffer") Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc')
-rw-r--r--net/rxrpc/input.c35
1 files changed, 19 insertions, 16 deletions
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 2dcef482acf2..8834aa627371 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -216,10 +216,11 @@ static void rxrpc_send_ping(struct rxrpc_call *call, struct sk_buff *skb,
/*
* Apply a hard ACK by advancing the Tx window.
*/
-static void rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to,
+static bool rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to,
struct rxrpc_ack_summary *summary)
{
struct sk_buff *skb, *list = NULL;
+ bool rot_last = false;
int ix;
u8 annotation;
@@ -243,15 +244,17 @@ static void rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to,
skb->next = list;
list = skb;
- if (annotation & RXRPC_TX_ANNO_LAST)
+ if (annotation & RXRPC_TX_ANNO_LAST) {
set_bit(RXRPC_CALL_TX_LAST, &call->flags);
+ rot_last = true;
+ }
if ((annotation & RXRPC_TX_ANNO_MASK) != RXRPC_TX_ANNO_ACK)
summary->nr_rot_new_acks++;
}
spin_unlock(&call->lock);
- trace_rxrpc_transmit(call, (test_bit(RXRPC_CALL_TX_LAST, &call->flags) ?
+ trace_rxrpc_transmit(call, (rot_last ?
rxrpc_transmit_rotate_last :
rxrpc_transmit_rotate));
wake_up(&call->waitq);
@@ -262,6 +265,8 @@ static void rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to,
skb->next = NULL;
rxrpc_free_skb(skb, rxrpc_skb_tx_freed);
}
+
+ return rot_last;
}
/*
@@ -332,11 +337,11 @@ static bool rxrpc_receiving_reply(struct rxrpc_call *call)
trace_rxrpc_timer(call, rxrpc_timer_init_for_reply, now);
}
- if (!test_bit(RXRPC_CALL_TX_LAST, &call->flags))
- rxrpc_rotate_tx_window(call, top, &summary);
if (!test_bit(RXRPC_CALL_TX_LAST, &call->flags)) {
- rxrpc_proto_abort("TXL", call, top);
- return false;
+ if (!rxrpc_rotate_tx_window(call, top, &summary)) {
+ rxrpc_proto_abort("TXL", call, top);
+ return false;
+ }
}
if (!rxrpc_end_tx_phase(call, true, "ETD"))
return false;
@@ -897,8 +902,12 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
if (nr_acks > call->tx_top - hard_ack)
return rxrpc_proto_abort("AKN", call, 0);
- if (after(hard_ack, call->tx_hard_ack))
- rxrpc_rotate_tx_window(call, hard_ack, &summary);
+ if (after(hard_ack, call->tx_hard_ack)) {
+ if (rxrpc_rotate_tx_window(call, hard_ack, &summary)) {
+ rxrpc_end_tx_phase(call, false, "ETA");
+ return;
+ }
+ }
if (nr_acks > 0) {
if (skb_copy_bits(skb, offset, buf.acks, nr_acks) < 0)
@@ -907,11 +916,6 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
&summary);
}
- if (test_bit(RXRPC_CALL_TX_LAST, &call->flags)) {
- rxrpc_end_tx_phase(call, false, "ETA");
- return;
- }
-
if (call->rxtx_annotations[call->tx_top & RXRPC_RXTX_BUFF_MASK] &
RXRPC_TX_ANNO_LAST &&
summary.nr_acks == call->tx_top - hard_ack &&
@@ -933,8 +937,7 @@ static void rxrpc_input_ackall(struct rxrpc_call *call, struct sk_buff *skb)
_proto("Rx ACKALL %%%u", sp->hdr.serial);
- rxrpc_rotate_tx_window(call, call->tx_top, &summary);
- if (test_bit(RXRPC_CALL_TX_LAST, &call->flags))
+ if (rxrpc_rotate_tx_window(call, call->tx_top, &summary))
rxrpc_end_tx_phase(call, false, "ETL");
}