From: Jörg Sommer <[email protected]>

The pattern `-serial` matches also `-device usb-serial` and `virtio-serial`
which are not the desired parameter. This causes the serial console ttyS1 is
missing and Systemd's getty@ttyS1 fails constantly.

Signed-off-by: Jörg Sommer <[email protected]>
Signed-off-by: Richard Purdie <[email protected]>
(cherry picked from commit b6d035894120b45b42f146ab5b3110522c58d178)
Signed-off-by: Steve Sakoman <[email protected]>
---
 scripts/runqemu | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/runqemu b/scripts/runqemu
index fe395d1bc6..2ab36fd03d 100755
--- a/scripts/runqemu
+++ b/scripts/runqemu
@@ -1487,7 +1487,7 @@ to your build configuration.
         # If no serial or serialtcp options were specified, only ttyS0 is 
created
         # and sysvinit shows an error trying to enable ttyS1:
         #     INIT: Id "S1" respawning too fast: disabled for 5 minutes
-        serial_num = len(re.findall("-serial", self.qemu_opt))
+        serial_num = len(re.findall("(^| )-serial ", self.qemu_opt))
 
         # Assume if the user passed serial options, they know what they want
         # and pad to two devices
@@ -1507,7 +1507,7 @@ to your build configuration.
 
                 self.qemu_opt += " %s" % self.get("QB_SERIAL_OPT")
 
-        serial_num = len(re.findall("-serial", self.qemu_opt))
+        serial_num = len(re.findall("(^| )-serial ", self.qemu_opt))
         if serial_num < 2:
             self.qemu_opt += " -serial null"
 
-- 
2.34.1

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