5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Vitalii Mordan <mordan@xxxxxxxxx>
commit 40c974826734836402abfd44efbf04f63a2cc1c1 upstream.
If the clock sehci->clk was not enabled in spear_ehci_hcd_drv_probe,
it should not be disabled in any path.
Conversely, if it was enabled in spear_ehci_hcd_drv_probe, it must be disabled
in all error paths to ensure proper cleanup.
Found by Linux Verification Center (linuxtesting.org) with Klever.
Fixes: 7675d6ba436f ("USB: EHCI: make ehci-spear a separate driver")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Vitalii Mordan <mordan@xxxxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20241114230310.432213-1-mordan@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/ehci-spear.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/usb/host/ehci-spear.c
+++ b/drivers/usb/host/ehci-spear.c
@@ -108,7 +108,9 @@ static int spear_ehci_hcd_drv_probe(stru
/* registers start at offset 0x0 */
hcd_to_ehci(hcd)->caps = hcd->regs;
- clk_prepare_enable(sehci->clk);
+ retval = clk_prepare_enable(sehci->clk);
+ if (retval)
+ goto err_put_hcd;
retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (retval)
goto err_stop_ehci;
@@ -133,8 +135,7 @@ static int spear_ehci_hcd_drv_remove(str
usb_remove_hcd(hcd);
- if (sehci->clk)
- clk_disable_unprepare(sehci->clk);
+ clk_disable_unprepare(sehci->clk);
usb_put_hcd(hcd);
return 0;
