diff options
| author | Cristian Marussi <cristian.marussi@arm.com> | 2021-07-12 15:18:18 +0100 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2021-07-13 11:42:20 +0100 |
| commit | bdb8742dc6f7c599c3d61959234fe4c23638727b (patch) | |
| tree | 279d72523cca59d8dbe91f9fefa6c6c84c4db5ce /drivers/firmware | |
| parent | 187a002b07e8089f0b5657eafec50b5d05625569 (diff) | |
| download | linux-bdb8742dc6f7c599c3d61959234fe4c23638727b.tar.gz linux-bdb8742dc6f7c599c3d61959234fe4c23638727b.tar.bz2 linux-bdb8742dc6f7c599c3d61959234fe4c23638727b.zip | |
firmware: arm_scmi: Fix range check for the maximum number of pending messages
SCMI message headers carry a sequence number and such field is sized to
allow for MSG_TOKEN_MAX distinct numbers; moreover zero is not really an
acceptable maximum number of pending in-flight messages.
Fix accordingly the checks performed on the value exported by transports
in scmi_desc.max_msg
Link: https://lore.kernel.org/r/20210712141833.6628-3-cristian.marussi@arm.com
Reported-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
[sudeep.holla: updated the patch title and error message]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/arm_scmi/driver.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 1cbd2b06e523..9b2e8d42a992 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -1026,8 +1026,9 @@ static int __scmi_xfer_info_init(struct scmi_info *sinfo, const struct scmi_desc *desc = sinfo->desc; /* Pre-allocated messages, no more than what hdr.seq can support */ - if (WARN_ON(desc->max_msg >= MSG_TOKEN_MAX)) { - dev_err(dev, "Maximum message of %d exceeds supported %ld\n", + if (WARN_ON(!desc->max_msg || desc->max_msg > MSG_TOKEN_MAX)) { + dev_err(dev, + "Invalid maximum messages %d, not in range [1 - %lu]\n", desc->max_msg, MSG_TOKEN_MAX); return -EINVAL; } |