From ea78361174c4746e8df8e6fdc0ec1dc710a6869d Mon Sep 17 00:00:00 2001 From: Sudip Mukherjee Date: Fri, 24 Apr 2020 17:19:44 +0100 Subject: [PATCH] thermal/drivers/ti-soc-thermal: Avoid dereferencing ERR_PTR [ Upstream commit 7440f518dad9d861d76c64956641eeddd3586f75 ] On error the function ti_bandgap_get_sensor_data() returns the error code in ERR_PTR() but we only checked if the return value is NULL or not. And, so we can dereference an error code inside ERR_PTR. While at it, convert a check to IS_ERR_OR_NULL. Signed-off-by: Sudip Mukherjee Reviewed-by: Amit Kucheria Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/20200424161944.6044-1-sudipm.mukherjee@gmail.com Signed-off-by: Sasha Levin --- drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c index d3e959d01606..85776db4bf34 100644 --- a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c +++ b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c @@ -169,7 +169,7 @@ int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id, data = ti_bandgap_get_sensor_data(bgp, id); - if (!data || IS_ERR(data)) + if (!IS_ERR_OR_NULL(data)) data = ti_thermal_build_data(bgp, id); if (!data) @@ -196,7 +196,7 @@ int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id) data = ti_bandgap_get_sensor_data(bgp, id); - if (data && data->ti_thermal) { + if (!IS_ERR_OR_NULL(data) && data->ti_thermal) { if (data->our_zone) thermal_zone_device_unregister(data->ti_thermal); } @@ -262,7 +262,7 @@ int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id) data = ti_bandgap_get_sensor_data(bgp, id); - if (data) { + if (!IS_ERR_OR_NULL(data)) { cpufreq_cooling_unregister(data->cool_dev); if (data->policy) cpufreq_cpu_put(data->policy);