5.4-stable review patch. If anyone has any objections, please let me know.
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From: Vitalii Mordan mordan@ispras.ru
commit 97264eaaba0122a5b7e8ddd7bf4ff3ac57c2b170 upstream.
If the clocks priv->iclk and priv->fclk were not enabled in ehci_hcd_sh_probe, they should not be disabled in any path.
Conversely, if they was enabled in ehci_hcd_sh_probe, they must be disabled in all error paths to ensure proper cleanup.
Found by Linux Verification Center (linuxtesting.org) with Klever.
Fixes: 63c845522263 ("usb: ehci-hcd: Add support for SuperH EHCI.") Cc: stable@vger.kernel.org # ff30bd6a6618: sh: clk: Fix clk_enable() to return 0 on NULL clk Signed-off-by: Vitalii Mordan mordan@ispras.ru Reviewed-by: Alan Stern stern@rowland.harvard.edu Link: https://lore.kernel.org/r/20241121114700.2100520-1-mordan@ispras.ru Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/host/ehci-sh.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
--- a/drivers/usb/host/ehci-sh.c +++ b/drivers/usb/host/ehci-sh.c @@ -124,8 +124,12 @@ static int ehci_hcd_sh_probe(struct plat if (IS_ERR(priv->iclk)) priv->iclk = NULL;
- clk_enable(priv->fclk); - clk_enable(priv->iclk); + ret = clk_enable(priv->fclk); + if (ret) + goto fail_request_resource; + ret = clk_enable(priv->iclk); + if (ret) + goto fail_iclk;
if (pdata && pdata->phy_init) pdata->phy_init(); @@ -144,6 +148,7 @@ static int ehci_hcd_sh_probe(struct plat
fail_add_hcd: clk_disable(priv->iclk); +fail_iclk: clk_disable(priv->fclk);
fail_request_resource: