Merge tag 'fs_for_v5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack...

[linux-2.6-microblaze.git] / net / smc / smc_tx.c

diff --git a/net/smc/smc_tx.c b/net/smc/smc_tx.c
index 289025c..c79361d 100644 (file)
--- a/net/smc/smc_tx.c
+++ b/net/smc/smc_tx.c
@@ -496,7 +496,7 @@ static int smc_tx_rdma_writes(struct smc_connection *conn,
 /* Wakeup sndbuf consumers from any context (IRQ or process)
  * since there is more data to transmit; usable snd_wnd as max transmit
  */
-static int smcr_tx_sndbuf_nonempty(struct smc_connection *conn)
+static int _smcr_tx_sndbuf_nonempty(struct smc_connection *conn)
 {
        struct smc_cdc_producer_flags *pflags = &conn->local_tx_ctrl.prod_flags;
        struct smc_link *link = conn->lnk;
@@ -550,6 +550,22 @@ out_unlock:
        return rc;
 }
 
+static int smcr_tx_sndbuf_nonempty(struct smc_connection *conn)
+{
+       struct smc_link *link = conn->lnk;
+       int rc = -ENOLINK;
+
+       if (!link)
+               return rc;
+
+       atomic_inc(&link->wr_tx_refcnt);
+       if (smc_link_usable(link))
+               rc = _smcr_tx_sndbuf_nonempty(conn);
+       if (atomic_dec_and_test(&link->wr_tx_refcnt))
+               wake_up_all(&link->wr_tx_wait);
+       return rc;
+}
+
 static int smcd_tx_sndbuf_nonempty(struct smc_connection *conn)
 {
        struct smc_cdc_producer_flags *pflags = &conn->local_tx_ctrl.prod_flags;