Revert "usb: renesas-xhci: Fix handling of unknown ROM state"

This reverts commit d143825baf15f204dac60acdf95e428182aa3374.

Justin reports some of his systems now fail as result of this commit:

 xhci_hcd 0000:04:00.0: Direct firmware load for renesas_usb_fw.mem failed with error -2
 xhci_hcd 0000:04:00.0: request_firmware failed: -2
 xhci_hcd: probe of 0000:04:00.0 failed with error -2

The revert brings back the original issue the commit tried to solve but
at least unbreaks existing systems relying on previous behavior.

Cc: stable@vger.kernel.org
Cc: Mathias Nyman <mathias.nyman@intel.com>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: Justin Forbes <jmforbes@linuxtx.org>
Reported-by: Justin Forbes <jmforbes@linuxtx.org>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Fixes: d143825baf15 ("usb: renesas-xhci: Fix handling of unknown ROM state")
Link: https://lore.kernel.org/r/20210719070519.41114-1-mdf@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-pci-renesas.c b/drivers/usb/host/xhci-pci-renesas.c
index 1da6479..5923844 100644 (file)
--- a/drivers/usb/host/xhci-pci-renesas.c
+++ b/drivers/usb/host/xhci-pci-renesas.c
@@ -207,8 +207,7 @@ static int renesas_check_rom_state(struct pci_dev *pdev)
                        return 0;
 
                case RENESAS_ROM_STATUS_NO_RESULT: /* No result yet */
-                       dev_dbg(&pdev->dev, "Unknown ROM status ...\n");
-                       break;
+                       return 0;
 
                case RENESAS_ROM_STATUS_ERROR: /* Error State */
                default: /* All other states are marked as "Reserved states" */
@@ -225,12 +224,13 @@ static int renesas_fw_check_running(struct pci_dev *pdev)
        u8 fw_state;
        int err;
 
-       /*
-        * Only if device has ROM and loaded FW we can skip loading and
-        * return success. Otherwise (even unknown state), attempt to load FW.
-        */
-       if (renesas_check_rom(pdev) && !renesas_check_rom_state(pdev))
-               return 0;
+       /* Check if device has ROM and loaded, if so skip everything */
+       err = renesas_check_rom(pdev);
+       if (err) { /* we have rom */
+               err = renesas_check_rom_state(pdev);
+               if (!err)
+                       return err;
+       }
 
        /*
         * Test if the device is actually needing the firmware. As most