diff options
| author |   Alexandre Rames <arames@solarflare.com> | 2013-07-03 09:47:34 +0100 |
|---|---|---|
| committer |   Ben Hutchings <bhutchings@solarflare.com> | 2013-08-27 22:29:48 +0100 |
| commit | 8c4e720f181f251948c52913c74a86f68aed9c50 (patch) | |
| tree | d04c3551f2673d837d6935f3afdb2990461a23bc /drivers | |
| parent | sfc: Add support for reading packet length from prefix (diff) | |
| download | linux-dev-8c4e720f181f251948c52913c74a86f68aed9c50.tar.xz linux-dev-8c4e720f181f251948c52913c74a86f68aed9c50.zip | |
sfc: Return an error code when a sensor is busy.
[bwh: Also name this new state, though we don't expect to see it in an event]
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/sfc/mcdi_mon.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/net/ethernet/sfc/mcdi_mon.c b/drivers/net/ethernet/sfc/mcdi_mon.c index 958c73faa523..544889bacecc 100644 --- a/drivers/net/ethernet/sfc/mcdi_mon.c +++ b/drivers/net/ethernet/sfc/mcdi_mon.c @@ -54,6 +54,7 @@ static const char *const sensor_status_names[] = { [MC_CMD_SENSOR_STATE_WARNING] = "Warning", [MC_CMD_SENSOR_STATE_FATAL] = "Fatal", [MC_CMD_SENSOR_STATE_BROKEN] = "Device failure", + [MC_CMD_SENSOR_STATE_NO_READING] = "No reading", }; void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev) @@ -144,13 +145,17 @@ static ssize_t efx_mcdi_mon_show_value(struct device *dev, struct efx_mcdi_mon_attribute *mon_attr = container_of(attr, struct efx_mcdi_mon_attribute, dev_attr); efx_dword_t entry; - unsigned int value; + unsigned int value, state; int rc; rc = efx_mcdi_mon_get_entry(dev, mon_attr->index, &entry); if (rc) return rc; + state = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_STATE); + if (state == MC_CMD_SENSOR_STATE_NO_READING) + return -EBUSY; + value = EFX_DWORD_FIELD(entry, MC_CMD_SENSOR_VALUE_ENTRY_TYPEDEF_VALUE); /* Convert temperature from degrees to milli-degrees Celsius */ |