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| author | Johan Hovold <johan@hovoldconsulting.com> | 2016-08-26 12:55:47 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2016-08-26 13:21:13 +0200 |
| commit | d2dee94b66162d0839dcccee663c90400492fd1b (patch) | |
| tree | e93dfbf1f6c6c99f2f09c354191c410d19350bf7 /drivers/staging/greybus/es2.c | |
| parent | 6ac9166d4e91a6dea03b64b64f128e0f927aa7ec (diff) | |
| download | op-kernel-dev-d2dee94b66162d0839dcccee663c90400492fd1b.zip op-kernel-dev-d2dee94b66162d0839dcccee663c90400492fd1b.tar.gz | |
greybus: es2: implement flush callback
Implement the flush callback which is called as part of connection tear
down to flush host-device queues and stop any ongoing transfers.
Note that this should be considered an optimisation of sort since if
the CPort is stuck waiting for credit, the CPort is likely still stuck
when we try to send the cport_shutdown request over it after the
callback returns.
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'drivers/staging/greybus/es2.c')
| -rw-r--r-- | drivers/staging/greybus/es2.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/staging/greybus/es2.c b/drivers/staging/greybus/es2.c index 8803bc9..1817c35 100644 --- a/drivers/staging/greybus/es2.c +++ b/drivers/staging/greybus/es2.c @@ -765,6 +765,24 @@ static int es2_cport_connected(struct gb_host_device *hd, u16 cport_id) return 0; } +static int es2_cport_flush(struct gb_host_device *hd, u16 cport_id) +{ + struct es2_ap_dev *es2 = hd_to_es2(hd); + struct device *dev = &es2->usb_dev->dev; + struct arpc_cport_flush_req req; + int ret; + + req.cport_id = cpu_to_le16(cport_id); + ret = arpc_sync(es2, ARPC_TYPE_CPORT_FLUSH, &req, sizeof(req), + NULL, ES2_ARPC_CPORT_TIMEOUT); + if (ret) { + dev_err(dev, "failed to flush cport %u: %d\n", cport_id, ret); + return ret; + } + + return 0; +} + static int es2_cport_quiesce(struct gb_host_device *hd, u16 cport_id, size_t peer_space, unsigned int timeout) { @@ -997,6 +1015,7 @@ static struct gb_hd_driver es2_driver = { .cport_enable = cport_enable, .cport_disable = cport_disable, .cport_connected = es2_cport_connected, + .cport_flush = es2_cport_flush, .cport_quiesce = es2_cport_quiesce, .cport_clear = es2_cport_clear, .latency_tag_enable = latency_tag_enable, |
