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| author |   Johannes Berg <johannes.berg@intel.com> | 2020-12-15 10:52:22 +0100 |
|---|---|---|
| committer |   Richard Weinberger <richard@nod.at> | 2021-02-12 21:21:52 +0100 |
| commit | 10c2b5aeb21c439251e5e828bf1362f89ab3de49 (patch) | |
| tree | ab647ac4c3ec4259c6c702664c5f822ae7672fa9 /arch/um | |
| parent | um: virtio: clean up a comment (diff) | |
| download | linux-dev-10c2b5aeb21c439251e5e828bf1362f89ab3de49.tar.xz linux-dev-10c2b5aeb21c439251e5e828bf1362f89ab3de49.zip | |
um: virtio: fix handling of messages without payload
If we have a message without payload, we call full_read() with
len set to 0, which causes it to return -ECONNRESET. Catch this
case and explicitly return 0 for it so we can actually use the
zero-size config-changed message.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/drivers/virtio_uml.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c index 515d648d3c3d..ef620caed8e7 100644 --- a/arch/um/drivers/virtio_uml.c +++ b/arch/um/drivers/virtio_uml.c @@ -97,6 +97,9 @@ static int full_read(int fd, void *buf, int len, bool abortable) { int rc; + if (!len) + return 0; + do { rc = os_read_file(fd, buf, len); if (rc > 0) { |