diff options
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/tb.c | 10 | ||||
| -rw-r--r-- | drivers/thunderbolt/usb4.c | 7 |
2 files changed, 11 insertions, 6 deletions
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index cdd1daaa5da1..bd5d119d7f64 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -1746,11 +1746,15 @@ static void tb_handle_dp_bandwidth_request(struct work_struct *work) goto unlock; } - requested_bw = usb4_dp_port_requested_bw(in); - if (requested_bw < 0) { - tb_port_dbg(in, "no bandwidth request active\n"); + ret = usb4_dp_port_requested_bw(in); + if (ret < 0) { + if (ret == -ENODATA) + tb_port_dbg(in, "no bandwidth request active\n"); + else + tb_port_warn(in, "failed to read requested bandwidth\n"); goto unlock; } + requested_bw = ret; tb_port_dbg(in, "requested bandwidth %d Mb/s\n", requested_bw); diff --git a/drivers/thunderbolt/usb4.c b/drivers/thunderbolt/usb4.c index 2a9266fb5c0f..1e5e9c147a31 100644 --- a/drivers/thunderbolt/usb4.c +++ b/drivers/thunderbolt/usb4.c @@ -2732,7 +2732,8 @@ int usb4_dp_port_allocate_bw(struct tb_port *port, int bw) * Reads the DPCD (graphics driver) requested bandwidth and returns it * in Mb/s. Takes the programmed granularity into account. In case of * error returns negative errno. Specifically returns %-EOPNOTSUPP if - * the adapter does not support bandwidth allocation mode. + * the adapter does not support bandwidth allocation mode, and %ENODATA + * if there is no active bandwidth request from the graphics driver. */ int usb4_dp_port_requested_bw(struct tb_port *port) { @@ -2750,10 +2751,10 @@ int usb4_dp_port_requested_bw(struct tb_port *port) ret = tb_port_read(port, &val, TB_CFG_PORT, port->cap_adap + ADP_DP_CS_8, 1); if (ret) - return 0; + return ret; if (!(val & ADP_DP_CS_8_DR)) - return 0; + return -ENODATA; return (val & ADP_DP_CS_8_REQUESTED_BW_MASK) * granularity; } |