tty: Fix a possible resource leak in icom_probe

[ Upstream commit ee157a79e7c82b01ae4c25de0ac75899801f322c ]

When pci_read_config_dword failed, call pci_release_regions() and
pci_disable_device() to recycle the resource previously allocated.

Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Huang Guobin <huangguobin4@huawei.com>
Link: https://lore.kernel.org/r/20220331091005.3290753-1-huangguobin4@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/tty/serial/icom.c b/drivers/tty/serial/icom.c
index 03a2fe9..02b375b 100644 (file)
--- a/drivers/tty/serial/icom.c
+++ b/drivers/tty/serial/icom.c
@@ -1501,7 +1501,7 @@ static int icom_probe(struct pci_dev *dev,
        retval = pci_read_config_dword(dev, PCI_COMMAND, &command_reg);
        if (retval) {
                dev_err(&dev->dev, "PCI Config read FAILED\n");
-               return retval;
+               goto probe_exit0;
        }
 
        pci_write_config_dword(dev, PCI_COMMAND,