* [PATCH] raw/ntb: immediate return if no doorbells
@ 2025-07-30 8:44 Tofig Aliev
0 siblings, 0 replies; only message in thread
From: Tofig Aliev @ 2025-07-30 8:44 UTC (permalink / raw)
To: jingjing.wu; +Cc: dev, Tofig Aliev
Added immediate return from ntb_dev_intr_handler()
if no doorbells.
Signed-off-by: Tofig Aliev <t.aliev.mnt@gmail.com>
---
...ntb-immediate-return-if-no-doorbells.patch | 32 +++++++++++++++++++
drivers/raw/ntb/ntb.c | 4 ++-
2 files changed, 35 insertions(+), 1 deletion(-)
create mode 100644 0001-raw-ntb-immediate-return-if-no-doorbells.patch
diff --git a/0001-raw-ntb-immediate-return-if-no-doorbells.patch b/0001-raw-ntb-immediate-return-if-no-doorbells.patch
new file mode 100644
index 0000000000..2fd9d47b6a
--- /dev/null
+++ b/0001-raw-ntb-immediate-return-if-no-doorbells.patch
@@ -0,0 +1,32 @@
+From bd47260510660e0a0ccd0cc8d9e5c5bcdebbb175 Mon Sep 17 00:00:00 2001
+From: Tofig Aliev <tofig.aliev.02@gmail.com>
+Date: Wed, 30 Jul 2025 02:07:27 +0700
+Subject: [PATCH] raw/ntb: immediate return if no doorbells
+
+Added immediate return from ntb_dev_intr_handler()
+if no doorbells.
+
+Signed-off-by: Tofig Aliev <tofig.aliev.02@gmail.com>
+---
+ drivers/raw/ntb/ntb.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/raw/ntb/ntb.c b/drivers/raw/ntb/ntb.c
+index 0ed4c14592..e298820e5f 100644
+--- a/drivers/raw/ntb/ntb.c
++++ b/drivers/raw/ntb/ntb.c
+@@ -158,8 +158,10 @@ ntb_dev_intr_handler(void *param)
+ }
+
+ db_bits = (*hw->ntb_ops->db_read)(dev);
+- if (!db_bits)
++ if (!db_bits) {
+ NTB_LOG(ERR, "No doorbells");
++ return;
++ }
+
+ /* Doorbell 0 is for peer device ready. */
+ if (db_bits & 1) {
+--
+2.43.0
+
diff --git a/drivers/raw/ntb/ntb.c b/drivers/raw/ntb/ntb.c
index 0ed4c14592..e298820e5f 100644
--- a/drivers/raw/ntb/ntb.c
+++ b/drivers/raw/ntb/ntb.c
@@ -158,8 +158,10 @@ ntb_dev_intr_handler(void *param)
}
db_bits = (*hw->ntb_ops->db_read)(dev);
- if (!db_bits)
+ if (!db_bits) {
NTB_LOG(ERR, "No doorbells");
+ return;
+ }
/* Doorbell 0 is for peer device ready. */
if (db_bits & 1) {
--
2.43.0
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