diff options
| author | Frank Li <[email protected]> | 2023-12-24 10:38:15 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2024-01-04 16:01:45 +0100 |
| commit | 40c304109e866a7dc123661a5c8ca72f6b5e14e0 (patch) | |
| tree | 330c34eeaf58037d8f84d87af3827842f5901a49 /net/lapb/lapb_out.c | |
| parent | 92f02efa1d86d7dcaef7f38a5fe3396c4e88a93c (diff) | |
usb: cdns3: Fix uvc fail when DMA cross 4k boundery since sg enabled
Supposed DMA cross 4k bounder problem should be fixed at DEV_VER_V2, but
still met problem when do ISO transfer if sg enabled.
Data pattern likes below when sg enabled, package size is 1k and mult is 2
[UVC Header(8B) ] [data(3k - 8)] ...
The received data at offset 0xd000 will get 0xc000 data, len 0x70. Error
happen position as below pattern:
0xd000: wrong
0xe000: wrong
0xf000: correct
0x10000: wrong
0x11000: wrong
0x12000: correct
...
To avoid DMA cross 4k bounder at ISO transfer, reduce burst len according
to start DMA address's alignment.
Cc: <[email protected]>
Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver")
Signed-off-by: Frank Li <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'net/lapb/lapb_out.c')
0 files changed, 0 insertions, 0 deletions