diff --git a/debian/patches/pve/0033-PVE-Add-PBS-block-driver-to-map-backup-archives-into.patch b/debian/patches/pve/0033-PVE-Add-PBS-block-driver-to-map-backup-archives-into.patch
index 9a850c0..86e85d2 100644
--- a/debian/patches/pve/0033-PVE-Add-PBS-block-driver-to-map-backup-archives-into.patch
+++ b/debian/patches/pve/0033-PVE-Add-PBS-block-driver-to-map-backup-archives-into.patch
@@ -7,8 +7,9 @@ Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
 [error cleanups, file_open implementation]
 Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>
 Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
-[adapt to changed function signatures]
-Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
+[FE: adapt to changed function signatures
+     make pbs_co_preadv return values consistent with QEMU]
+Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
 ---
  block/meson.build    |   3 +
  block/pbs.c          | 276 +++++++++++++++++++++++++++++++++++++++++++
@@ -34,7 +35,7 @@ index 2783b77e9c..a26a69434e 100644
  
 diff --git a/block/pbs.c b/block/pbs.c
 new file mode 100644
-index 0000000000..0b05ea9080
+index 0000000000..9d1f1f39d4
 --- /dev/null
 +++ b/block/pbs.c
 @@ -0,0 +1,276 @@
@@ -244,7 +245,7 @@ index 0000000000..0b05ea9080
 +
 +    if (offset < 0 || bytes < 0) {
 +        fprintf(stderr, "unexpected negative 'offset' or 'bytes' value!\n");
-+        return -EINVAL;
++        return -EIO;
 +    }
 +
 +    ReadCallbackData rcb = {
@@ -266,7 +267,7 @@ index 0000000000..0b05ea9080
 +    qemu_iovec_from_buf(qiov, 0, buf, bytes);
 +    free(buf);
 +
-+    return ret;
++    return 0;
 +}
 +
 +static coroutine_fn int pbs_co_pwritev(BlockDriverState *bs,
diff --git a/debian/patches/pve/0045-PVE-block-pbs-fast-path-reads-without-allocation-if-.patch b/debian/patches/pve/0045-PVE-block-pbs-fast-path-reads-without-allocation-if-.patch
index 893104a..48e6d67 100644
--- a/debian/patches/pve/0045-PVE-block-pbs-fast-path-reads-without-allocation-if-.patch
+++ b/debian/patches/pve/0045-PVE-block-pbs-fast-path-reads-without-allocation-if-.patch
@@ -49,5 +49,5 @@ index 0b05ea9080..c5eb4d5bad 100644
 +        g_free(buf);
 +    }
  
-     return ret;
+     return 0;
  }
diff --git a/debian/patches/pve/0048-block-add-alloc-track-driver.patch b/debian/patches/pve/0048-block-add-alloc-track-driver.patch
index 45c1c4d..d47c84b 100644
--- a/debian/patches/pve/0048-block-add-alloc-track-driver.patch
+++ b/debian/patches/pve/0048-block-add-alloc-track-driver.patch
@@ -24,8 +24,9 @@ once the backing image is removed. It will be replaced by 'file'.
 
 Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
 Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
-[adapt to changed function signatures]
-Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
+[FE: adapt to changed function signatures
+     make error return value consistent with QEMU]
+Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
 ---
  block/alloc-track.c | 350 ++++++++++++++++++++++++++++++++++++++++++++
  block/meson.build   |   1 +
@@ -34,7 +35,7 @@ Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
 
 diff --git a/block/alloc-track.c b/block/alloc-track.c
 new file mode 100644
-index 0000000000..6b50fbe537
+index 0000000000..43d40d11af
 --- /dev/null
 +++ b/block/alloc-track.c
 @@ -0,0 +1,350 @@
@@ -181,7 +182,7 @@ index 0000000000..6b50fbe537
 +
 +    if (offset < 0 || bytes < 0) {
 +        fprintf(stderr, "unexpected negative 'offset' or 'bytes' value!\n");
-+        return -EINVAL;
++        return -EIO;
 +    }
 +
 +    /* a read request can span multiple granularity-sized chunks, and can thus