kumquat-buildroot/package/nbd/nbd-server-fix-read-eagain.patch

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--- nbd-2.9.11.orig/nbd-server.c
+++ nbd-2.9.11/nbd-server.c
@@ -304,10 +304,14 @@
ssize_t res;
while (len > 0) {
DEBUG("*");
- if ((res = read(f, buf, len)) <= 0)
- err("Read failed: %m");
- len -= res;
- buf += res;
+ if ((res = read(f, buf, len)) <= 0) {
+ if(errno != EAGAIN) {
+ err("Read failed: %m");
+ }
+ } else {
+ len -= res;
+ buf += res;
+ }
}
}