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.
Cc: Elliot Berman <[email protected]> Cc: Brian Masney <[email protected]> Cc: Stephan Gerhold <[email protected]> Cc: Jeffrey Hugo <[email protected]> Cc: Douglas Anderson <[email protected]> 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 <[email protected]> --- 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 f57779fc7ee9..2be5573dce53 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); @@ -1060,17 +1056,18 @@ 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); -- https://chromeos.dev
