linux-kernel - [PATCH v3 08/10] drivers: qcom: rpmh-rsc: Don't double-check rpmh

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200407164915.v3.8.I8e187cdfb7a31f5bb7724f1f937f2862ee464a35@changeid>
Date:   Tue,  7 Apr 2020 16:50:22 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Maulik Shah <mkshah@...eaurora.org>
Cc:     mka@...omium.org, Lina Iyer <ilina@...eaurora.org>,
        Rajendra Nayak <rnayak@...eaurora.org>, swboyd@...omium.org,
        evgreen@...omium.org, Douglas Anderson <dianders@...omium.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 08/10] drivers: qcom: rpmh-rsc: Don't double-check rpmh

The calls rpmh_rsc_write_ctrl_data() and rpmh_rsc_send_data() are only
ever called from rpmh.c.  We know that rpmh.c already error checked
the message.  There's no reason to do it again in rpmh-rsc.

Suggested-by: Maulik Shah <mkshah@...eaurora.org>
Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

Changes in v3:
- ("Don't double-check rpmh") replaces ("Warning if tcs_write...")

Changes in v2: None

 drivers/soc/qcom/rpmh-rsc.c | 18 +-----------------
 1 file changed, 1 insertion(+), 17 deletions(-)

diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index 9502e7ea96be..10c026b2e1bc 100644
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -633,7 +633,7 @@ static int tcs_write(struct rsc_drv *drv, const struct tcs_request *msg)
 }
 
 /**
- * rpmh_rsc_send_data() - Validate the incoming message + write to TCS block.
+ * rpmh_rsc_send_data() - Write / trigger active-only message.
  * @drv: The controller.
  * @msg: The data to be sent.
  *
@@ -658,12 +658,6 @@ int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg)
 {
 	int ret;
 
-	if (!msg || !msg->cmds || !msg->num_cmds ||
-	    msg->num_cmds > MAX_RPMH_PAYLOAD) {
-		WARN_ON(1);
-		return -EINVAL;
-	}
-
 	do {
 		ret = tcs_write(drv, msg);
 		if (ret == -EBUSY) {
@@ -734,16 +728,6 @@ int rpmh_rsc_write_ctrl_data(struct rsc_drv *drv, const struct tcs_request *msg)
 	unsigned long flags;
 	int ret;
 
-	if (!msg || !msg->cmds || !msg->num_cmds ||
-	    msg->num_cmds > MAX_RPMH_PAYLOAD) {
-		pr_err("Payload error\n");
-		return -EINVAL;
-	}
-
-	/* Data sent to this API will not be sent immediately */
-	if (msg->state == RPMH_ACTIVE_ONLY_STATE)
-		return -EINVAL;
-
 	tcs = get_tcs_for_msg(drv, msg);
 	if (IS_ERR(tcs))
 		return PTR_ERR(tcs);
-- 
2.26.0.292.g33ef6b2f38-goog