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 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@vger.kernel.org Signed-off-by: Vitalii Mordan mordan@ispras.ru Acked-by: Alan Stern stern@rowland.harvard.edu Link: https://lore.kernel.org/r/20241114230310.432213-1-mordan@ispras.ru Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -110,7 +110,9 @@ 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; @@ -135,8 +137,7 @@ 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;