habanalabs: avoid copying pll data if pll_info_get fails

If reading PLL info from F/W fails, the PLL info is not set in the
"result" variable, and hence shouldn't be copied to the caller's array.

Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

diff --git a/drivers/misc/habanalabs/common/firmware_if.c b/drivers/misc/habanalabs/common/firmware_if.c
index 93e9045..7f76f98 100644 (file)
--- a/drivers/misc/habanalabs/common/firmware_if.c
+++ b/drivers/misc/habanalabs/common/firmware_if.c
@@ -958,15 +958,17 @@ int hl_fw_cpucp_pll_info_get(struct hl_device *hdev, u32 pll_index,
 
        rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
                        HL_CPUCP_INFO_TIMEOUT_USEC, &result);
-       if (rc)
+       if (rc) {
                dev_err(hdev->dev, "Failed to read PLL info, error %d\n", rc);
+               return rc;
+       }
 
        pll_freq_arr[0] = FIELD_GET(CPUCP_PKT_RES_PLL_OUT0_MASK, result);
        pll_freq_arr[1] = FIELD_GET(CPUCP_PKT_RES_PLL_OUT1_MASK, result);
        pll_freq_arr[2] = FIELD_GET(CPUCP_PKT_RES_PLL_OUT2_MASK, result);
        pll_freq_arr[3] = FIELD_GET(CPUCP_PKT_RES_PLL_OUT3_MASK, result);
 
-       return rc;
+       return 0;
 }
 
 int hl_fw_cpucp_power_get(struct hl_device *hdev, u64 *power)