From: Moritz Fischer <mdf@xxxxxxxxxx>
commit d143825baf15f204dac60acdf95e428182aa3374 upstream.
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: 2478be82de44 ("usb: renesas-xhci: Add ROM loader for uPD720201")
Cc: stable@xxxxxxxxxxxxxxx
Cc: Mathias Nyman <mathias.nyman@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Vinod Koul <vkoul@xxxxxxxxxx>
Tested-by: Vinod Koul <vkoul@xxxxxxxxxx>
Reviewed-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Moritz Fischer <mdf@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210615153758.253572-1-mdf@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-pci-renesas.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
--- a/drivers/usb/host/xhci-pci-renesas.c
+++ b/drivers/usb/host/xhci-pci-renesas.c
@@ -207,7 +207,8 @@ static int renesas_check_rom_state(struc
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(stru
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
