vfio-pci: Update slow path INTx algorithm

[qemu.git] / posix-aio-compat.c

diff --git a/posix-aio-compat.c b/posix-aio-compat.c
index d311d1389061e7094b1b79d1b236cd41ecde1d50..96e4daf5059fedae6ca8f4d6ed8292562e0ce4a5 100644 (file)
--- a/posix-aio-compat.c
+++ b/posix-aio-compat.c
@@ -29,6 +29,7 @@
 #include "qemu-common.h"
 #include "trace.h"
 #include "block_int.h"
+#include "iov.h"
 
 #include "block/raw-posix-aio.h"
 
@@ -351,11 +352,8 @@ static void *aio_thread(void *unused)
             if (ret >= 0 && ret < aiocb->aio_nbytes && aiocb->common.bs->growable) {
                 /* A short read means that we have reached EOF. Pad the buffer
                  * with zeros for bytes after EOF. */
-                QEMUIOVector qiov;
-
-                qemu_iovec_init_external(&qiov, aiocb->aio_iov,
-                                         aiocb->aio_niov);
-                qemu_iovec_memset_skip(&qiov, 0, aiocb->aio_nbytes - ret, ret);
+                iov_memset(aiocb->aio_iov, aiocb->aio_niov, ret,
+                           0, aiocb->aio_nbytes - ret);
 
                 ret = aiocb->aio_nbytes;
             }
@@ -468,26 +466,37 @@ static int qemu_paio_error(struct qemu_paiocb *aiocb)
     return ret;
 }
 
-static int posix_aio_process_queue(void *opaque)
+static void posix_aio_read(void *opaque)
 {
     PosixAioState *s = opaque;
     struct qemu_paiocb *acb, **pacb;
     int ret;
-    int result = 0;
+    ssize_t len;
+
+    /* read all bytes from signal pipe */
+    for (;;) {
+        char bytes[16];
+
+        len = read(s->rfd, bytes, sizeof(bytes));
+        if (len == -1 && errno == EINTR)
+            continue; /* try again */
+        if (len == sizeof(bytes))
+            continue; /* more to read */
+        break;
+    }
 
     for(;;) {
         pacb = &s->first_aio;
         for(;;) {
             acb = *pacb;
             if (!acb)
-                return result;
+                return;
 
             ret = qemu_paio_error(acb);
             if (ret == ECANCELED) {
                 /* remove the request */
                 *pacb = acb->next;
                 qemu_aio_release(acb);
-                result = 1;
             } else if (ret != EINPROGRESS) {
                 /* end of aio */
                 if (ret == 0) {
@@ -507,35 +516,12 @@ static int posix_aio_process_queue(void *opaque)
                 /* call the callback */
                 acb->common.cb(acb->common.opaque, ret);
                 qemu_aio_release(acb);
-                result = 1;
                 break;
             } else {
                 pacb = &acb->next;
             }
         }
     }
-
-    return result;
-}
-
-static void posix_aio_read(void *opaque)
-{
-    PosixAioState *s = opaque;
-    ssize_t len;
-
-    /* read all bytes from signal pipe */
-    for (;;) {
-        char bytes[16];
-
-        len = read(s->rfd, bytes, sizeof(bytes));
-        if (len == -1 && errno == EINTR)
-            continue; /* try again */
-        if (len == sizeof(bytes))
-            continue; /* more to read */
-        break;
-    }
-
-    posix_aio_process_queue(s);
 }
 
 static int posix_aio_flush(void *opaque)
@@ -675,8 +661,7 @@ int paio_init(void)
     fcntl(s->rfd, F_SETFL, O_NONBLOCK);
     fcntl(s->wfd, F_SETFL, O_NONBLOCK);
 
-    qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush,
-        posix_aio_process_queue, s);
+    qemu_aio_set_fd_handler(s->rfd, posix_aio_read, NULL, posix_aio_flush, s);
 
     ret = pthread_attr_init(&attr);
     if (ret)