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| author | Cristian Marussi <cristian.marussi@arm.com> | 2022-03-30 17:05:31 +0200 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2022-04-28 11:47:19 +0200 |
| commit | 4de1b36fae866c02f264f6bcda7a9a9e00ec5306 (patch) | |
| tree | c53207fbfad90c723e4feac92e9ae62e274ce1a4 /drivers/firmware/arm_scmi/power.c | |
| parent | firmware: arm_scmi: Fix sparse warnings in OPTEE transport driver (diff) | |
| download | linux-4de1b36fae866c02f264f6bcda7a9a9e00ec5306.tar.xz linux-4de1b36fae866c02f264f6bcda7a9a9e00ec5306.zip | |
firmware: arm_scmi: Make protocols initialisation fail on basic errors
Bail out of protocol initialisation routine early when basic information
about protocol version and attributes could not be retrieved. Failing to
act this way can lead to a successfully initialized SCMI protocol which
is in fact not fully functional.
Link: https://lore.kernel.org/r/20220330150551.2573938-3-cristian.marussi@arm.com
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scmi/power.c')
| -rw-r--r-- | drivers/firmware/arm_scmi/power.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/firmware/arm_scmi/power.c b/drivers/firmware/arm_scmi/power.c index ad2ab080f344..0f0b94f0b624 100644 --- a/drivers/firmware/arm_scmi/power.c +++ b/drivers/firmware/arm_scmi/power.c @@ -280,11 +280,13 @@ static const struct scmi_protocol_events power_protocol_events = { static int scmi_power_protocol_init(const struct scmi_protocol_handle *ph) { - int domain; + int domain, ret; u32 version; struct scmi_power_info *pinfo; - ph->xops->version_get(ph, &version); + ret = ph->xops->version_get(ph, &version); + if (ret) + return ret; dev_dbg(ph->dev, "Power Version %d.%d\n", PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version)); @@ -293,7 +295,9 @@ static int scmi_power_protocol_init(const struct scmi_protocol_handle *ph) if (!pinfo) return -ENOMEM; - scmi_power_attributes_get(ph, pinfo); + ret = scmi_power_attributes_get(ph, pinfo); + if (ret) + return ret; pinfo->dom_info = devm_kcalloc(ph->dev, pinfo->num_domains, sizeof(*pinfo->dom_info), GFP_KERNEL); |