From e0f2cfeb59c81cbcfc7fbcb7ec0636020499813b Mon Sep 17 00:00:00 2001 From: Jordan Crouse Date: Fri, 5 Oct 2018 18:38:29 +0530 Subject: soc: qcom: llcc-slice: Add error checks for API functions llcc_slice_getd can return a ERR_PTR code on failure. Add a IS_ERR_OR_NULL check to subsequent API calls that use struct llcc_slice_desc to guard against faults and to let the leaf drivers get away with safely using a ERR_PTR() encoded "pointer" in the aftermath of a llcc_slice_getd error. Signed-off-by: Jordan Crouse Reviewed-by: Vivek Gautam Signed-off-by: Andy Gross --- drivers/soc/qcom/llcc-slice.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/soc/qcom/llcc-slice.c b/drivers/soc/qcom/llcc-slice.c index 7f55203d28d7..6a7d0162fe0e 100644 --- a/drivers/soc/qcom/llcc-slice.c +++ b/drivers/soc/qcom/llcc-slice.c @@ -96,7 +96,8 @@ EXPORT_SYMBOL_GPL(llcc_slice_getd); */ void llcc_slice_putd(struct llcc_slice_desc *desc) { - kfree(desc); + if (!IS_ERR_OR_NULL(desc)) + kfree(desc); } EXPORT_SYMBOL_GPL(llcc_slice_putd); @@ -143,6 +144,9 @@ int llcc_slice_activate(struct llcc_slice_desc *desc) int ret; u32 act_ctrl_val; + if (IS_ERR_OR_NULL(desc)) + return -EINVAL; + mutex_lock(&drv_data->lock); if (test_bit(desc->slice_id, drv_data->bitmap)) { mutex_unlock(&drv_data->lock); @@ -177,6 +181,9 @@ int llcc_slice_deactivate(struct llcc_slice_desc *desc) u32 act_ctrl_val; int ret; + if (IS_ERR_OR_NULL(desc)) + return -EINVAL; + mutex_lock(&drv_data->lock); if (!test_bit(desc->slice_id, drv_data->bitmap)) { mutex_unlock(&drv_data->lock); @@ -204,6 +211,9 @@ EXPORT_SYMBOL_GPL(llcc_slice_deactivate); */ int llcc_get_slice_id(struct llcc_slice_desc *desc) { + if (IS_ERR_OR_NULL(desc)) + return -EINVAL; + return desc->slice_id; } EXPORT_SYMBOL_GPL(llcc_get_slice_id); @@ -214,6 +224,9 @@ EXPORT_SYMBOL_GPL(llcc_get_slice_id); */ size_t llcc_get_slice_size(struct llcc_slice_desc *desc) { + if (IS_ERR_OR_NULL(desc)) + return 0; + return desc->slice_size; } EXPORT_SYMBOL_GPL(llcc_get_slice_size); -- cgit v1.2.3