@@ -108,7 +108,12 @@ static int intel_eth_plat_probe(struct platform_device *pdev)
if (IS_ERR(dwmac->tx_clk))
return PTR_ERR(dwmac->tx_clk);
- clk_prepare_enable(dwmac->tx_clk);
+ ret = clk_prepare_enable(dwmac->tx_clk);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to enable tx_clk\n");
+ return ret;
+ }
/* Check and configure TX clock rate */
rate = clk_get_rate(dwmac->tx_clk);
@@ -117,6 +122,7 @@ static int intel_eth_plat_probe(struct platform_device *pdev)
rate = dwmac->data->tx_clk_rate;
ret = clk_set_rate(dwmac->tx_clk, rate);
if (ret) {
+ clk_disable_unprepare(dwmac->tx_clk);
dev_err(&pdev->dev,
"Failed to set tx_clk\n");
return ret;
@@ -131,6 +137,8 @@ static int intel_eth_plat_probe(struct platform_device *pdev)
rate = dwmac->data->ptp_ref_clk_rate;
ret = clk_set_rate(plat_dat->clk_ptp_ref, rate);
if (ret) {
+ if (dwmac->data->tx_clk_en)
+ clk_disable_unprepare(dwmac->tx_clk);
dev_err(&pdev->dev,
"Failed to set clk_ptp_ref\n");
return ret;
@@ -150,7 +158,8 @@ static int intel_eth_plat_probe(struct platform_device *pdev)
ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
if (ret) {
- clk_disable_unprepare(dwmac->tx_clk);
+ if (dwmac->data->tx_clk_en)
+ clk_disable_unprepare(dwmac->tx_clk);
return ret;
}
@@ -162,7 +171,8 @@ static void intel_eth_plat_remove(struct platform_device *pdev)
struct intel_dwmac *dwmac = get_stmmac_bsp_priv(&pdev->dev);
stmmac_pltfr_remove(pdev);
- clk_disable_unprepare(dwmac->tx_clk);
+ if (dwmac->data->tx_clk_en)
+ clk_disable_unprepare(dwmac->tx_clk);
}
static struct platform_driver intel_eth_plat_driver = {
If the clock dwmac->tx_clk was not enabled in intel_eth_plat_probe, it should not be disabled in any path. Conversely, if it was enabled in intel_eth_plat_probe, it must be disabled in all error paths to ensure proper cleanup. Found by Linux Verification Center (linuxtesting.org) with Klever. Fixes: 9efc9b2b04c7 ("net: stmmac: Add dwmac-intel-plat for GBE driver") Signed-off-by: Vitalii Mordan <mordan@ispras.ru> --- .../ethernet/stmicro/stmmac/dwmac-intel-plat.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-)