Set the maximum packet size to 512 for SuperSpeed devices.
Signed-off-by: Patrick Rudolph <patrick.rudo...@9elements.com>
---
grub-core/bus/usb/usbtrans.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/grub-core/bus/usb/usbtrans.c b/grub-core/bus/usb/usbtrans.c
index 85f081fff..72eb9b598 100644
--- a/grub-core/bus/usb/usbtrans.c
+++ b/grub-core/bus/usb/usbtrans.c
@@ -128,8 +128,12 @@ grub_usb_control_msg (grub_usb_device_t dev,
setupdata_addr = grub_dma_get_phys (setupdata_chunk);
/* Determine the maximum packet size. */
- if (dev->descdev.maxsize0)
+ if (dev->descdev.maxsize0 && dev->speed != GRUB_USB_SPEED_SUPER)
max = dev->descdev.maxsize0;
+ else if (dev->descdev.maxsize0 && dev->speed == GRUB_USB_SPEED_SUPER)
+ max = 1UL << dev->descdev.maxsize0;
+ else if (dev->speed == GRUB_USB_SPEED_SUPER)
+ max = 512;
else
max = 64;
--
2.26.2
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