[PATCH 5.11 233/601] firmware: qcom_scm: Make __qcom_scm_is_call_available() return bool

Greg Kroah-Hartman
2021-05-12T17:15:52Z

From: Stephen Boyd <swboyd@chromium.org>

[ Upstream commit 9d11af8b06a811c5c4878625f51ce109e2af4e80 ]

Make __qcom_scm_is_call_available() return bool instead of int. The
function has "is" in the name, so it should return a bool to indicate
the truth of the call being available. Unfortunately, it can return a
number < 0 which also looks "true", but not all callers expect that and
thus they think a call is available when really the check to see if the
call is available failed to figure it out.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Elliot Berman <eberman@codeaurora.org>
Cc: Brian Masney <masneyb@onstation.org>
Cc: Stephan Gerhold <stephan@gerhold.net>
Cc: Jeffrey Hugo <jhugo@codeaurora.org>
Cc: Douglas Anderson <dianders@chromium.org>
Fixes: 0f206514749b ("scsi: firmware: qcom_scm: Add support for programming inline crypto keys")
Fixes: 0434a4061471 ("firmware: qcom: scm: add support to restore secure config to qcm_scm-32")
Fixes: b0a1614fb1f5 ("firmware: qcom: scm: add OCMEM lock/unlock interface")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20210223214539.1336155-2-swboyd@chromium.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/firmware/qcom_scm.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 7be48c1bec96..54ba2834e763 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -113,9 +113,6 @@ static void qcom_scm_clk_disable(void)
clk_disable_unprepare(__scm->bus_clk);
}

-static int __qcom_scm_is_call_available(struct device *dev, u32 svc_id,
- u32 cmd_id);
-
enum qcom_scm_convention qcom_scm_convention;
static bool has_queried __read_mostly;
static DEFINE_SPINLOCK(query_lock);
@@ -219,8 +216,8 @@ static int qcom_scm_call_atomic(struct device *dev,
}
}

-static int __qcom_scm_is_call_available(struct device *dev, u32 svc_id,
- u32 cmd_id)
+static bool __qcom_scm_is_call_available(struct device *dev, u32 svc_id,
+ u32 cmd_id)
{
int ret;
struct qcom_scm_desc desc = {
@@ -247,7 +244,7 @@ static int __qcom_scm_is_call_available(struct device *dev, u32 svc_id,

ret = qcom_scm_call(dev, &desc, &res);

- return ret ? : res.result[0];
+ return ret ? false : !!res.result[0];
}

/**
@@ -585,9 +582,8 @@ bool qcom_scm_pas_supported(u32 peripheral)
};
struct qcom_scm_res res;

- ret = __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_PIL,
- QCOM_SCM_PIL_PAS_IS_SUPPORTED);
- if (ret <= 0)
+ if (!__qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_PIL,
+ QCOM_SCM_PIL_PAS_IS_SUPPORTED))
return false;

ret = qcom_scm_call(__scm->dev, &desc, &res);
@@ -1054,17 +1050,18 @@ EXPORT_SYMBOL(qcom_scm_ice_set_key);
*/
bool qcom_scm_hdcp_available(void)
{
+ bool avail;
int ret = qcom_scm_clk_enable();

if (ret)
return ret;

- ret = __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_HDCP,
+ avail = __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_HDCP,
QCOM_SCM_HDCP_INVOKE);

qcom_scm_clk_disable();

- return ret > 0;
+ return avail;
}
EXPORT_SYMBOL(qcom_scm_hdcp_available);

--
2.30.2