From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
The return error check on the call to ath11k_pci_get_user_msi_assignment is
missing. If an error does occur, num_vectors is still set to zero and
later on a division by zero can occur when variable vector is being
calculated. Fix this by adding an error check after the call.
Addresses-Coverity: ("Division or modulo by zero")
Fixes: d4ecb90b3857 ("ath11k: enable DP interrupt setup for QCA6390")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath11k/pci.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
index ca7012d46c3f..058885776a3a 100644
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -648,9 +648,12 @@ static int ath11k_pci_ext_irq_config(struct ath11k_base *ab)
int i, j, ret, num_vectors = 0;
u32 user_base_data = 0, base_vector = 0;
- ath11k_pci_get_user_msi_assignment(ath11k_pci_priv(ab), "DP",
- &num_vectors, &user_base_data,
- &base_vector);
+ ret = ath11k_pci_get_user_msi_assignment(ath11k_pci_priv(ab), "DP",
+ &num_vectors,
+ &user_base_data,
+ &base_vector);
+ if (ret < 0)
+ return ret;
for (i = 0; i < ATH11K_EXT_IRQ_GRP_NUM_MAX; i++) {
struct ath11k_ext_irq_grp *irq_grp = &ab->ext_irq_grp[i];
--
2.27.0
