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

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The ROM load sometimes seems to return an unknown status
(RENESAS_ROM_STATUS_NO_RESULT) instead of success / fail.

If the ROM load indeed failed this leads to failures when trying to
communicate with the controller later on.

Attempt to load firmware using RAM load in those cases.

Fixes: 2478be82de ("usb: renesas-xhci: Add ROM loader for uPD720201")
Cc: stable@vger.kernel.org
Cc: Mathias Nyman <mathias.nyman@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Vinod Koul <vkoul@kernel.org>
Tested-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Link: https://lore.kernel.org/r/20210615153758.253572-1-mdf@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Moritz Fischer 2021-06-15 08:37:58 -07:00 committed by Greg Kroah-Hartman
parent 1da8116eb0
commit d143825baf
1 changed files with 8 additions and 8 deletions
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16
drivers/usb/host/xhci-pci-renesas.c
View file

@ -207,7 +207,8 @@ static int renesas_check_rom_state(struct pci_dev *pdev)
return 0;
case RENESAS_ROM_STATUS_NO_RESULT: /* No result yet */
return 0;
dev_dbg(&pdev->dev, "Unknown ROM status ...\n");
break;
case RENESAS_ROM_STATUS_ERROR: /* Error State */
default: /* All other states are marked as "Reserved states" */
@ -224,13 +225,12 @@ static int renesas_fw_check_running(struct pci_dev *pdev)
u8 fw_state;
int err;
/* 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;
}
/*
* 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;
/*
* Test if the device is actually needing the firmware. As most