merge revision(s) 2554c5d3b8738a248cedb2fea96dfab9fbe19417: [Backport #20231]

	Don't wait in `io_binwrite_string` if not necessary. (#9792)

	---
	 io.c | 8 +++-----
	 1 file changed, 3 insertions(+), 5 deletions(-)

2 files changed, 4 insertions, 6 deletions

diff --git a/io.c b/io.c
index 4caf771b05..0c5bbf0cb4 100644
--- a/io.c
+++ b/io.c
@@ -1789,13 +1789,11 @@ io_binwrite_string(VALUE arg)
         // Write as much as possible:
         ssize_t result = io_binwrite_string_internal(p->fptr, ptr, remaining);
 
-        // If only the internal buffer is written, result will be zero [bytes of given data written]. This means we
-        // should try again.
         if (result == 0) {
-            errno = EWOULDBLOCK;
+            // If only the internal buffer is written, result will be zero [bytes of given data written]. This means we
+            // should try again immediately.
         }
-
-        if (result > 0) {
+        else if (result > 0) {
             if ((size_t)result == remaining) break;
             ptr += result;
             remaining -= result;
diff --git a/version.h b/version.h
index ef3bee1af1..14bd9775ae 100644
--- a/version.h
+++ b/version.h
@@ -11,7 +11,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 3
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 161
+#define RUBY_PATCHLEVEL 162
 
 #include "ruby/version.h"
 #include "ruby/internal/abi.h"