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| author |   Stefano Stabellini <sstabellini@kernel.org> | 2018-12-21 15:06:29 -0800 |
|---|---|---|
| committer |   Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2019-01-02 10:59:48 -0500 |
| commit | b79470b64fa9266948d1ce8d825ced94c4f63293 (patch) | |
| tree | 096e3cb80f128bbf7ed320f8141c13975a2d4d59 /drivers/xen | |
| parent | ALSA: xen-front: Use Xen common shared buffer implementation (diff) | |
| download | linux-dev-b79470b64fa9266948d1ce8d825ced94c4f63293.tar.xz linux-dev-b79470b64fa9266948d1ce8d825ced94c4f63293.zip | |
pvcalls-front: read all data before closing the connection
When a connection is closing in_error is set to ENOTCONN. There could
still be outstanding data on the ring left by the backend. Before
closing the connection on the frontend side, drain the ring.
Signed-off-by: Stefano Stabellini <stefanos@xilinx.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/pvcalls-front.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c index 77224d8f3e6f..e5d95aab2cb8 100644 --- a/drivers/xen/pvcalls-front.c +++ b/drivers/xen/pvcalls-front.c @@ -560,15 +560,13 @@ static int __read_ring(struct pvcalls_data_intf *intf, error = intf->in_error; /* get pointers before reading from the ring */ virt_rmb(); - if (error < 0) - return error; size = pvcalls_queued(prod, cons, array_size); masked_prod = pvcalls_mask(prod, array_size); masked_cons = pvcalls_mask(cons, array_size); if (size == 0) - return 0; + return error ?: size; if (len > size) len = size; |