diff options
| author | Peter Fink <[email protected]> | 2021-12-07 19:43:24 +0100 |
|---|---|---|
| committer | Marc Kleine-Budde <[email protected]> | 2022-03-10 09:49:15 +0100 |
| commit | eb9fa77a4211cd74d761c46627ac343916fb854e (patch) | |
| tree | d52bf0812149d01fefee120224acf37aaeec1730 /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | 26949ac935e37ad47fbe35cf0ff6e51aeeb15c6f (diff) | |
can: gs_usb: add usb quirk for NXP LPC546xx controllers
Introduce a workaround for a NXP chip errata on LPC546xx
controllers (Errata sheet LPC546xx / USB.15).
According to the document corruption can occur when the following
conditions are met:
* A TX (IN) transfer happens after a RX (OUT) transfer.
* The RX (OUT) transfer length is 4 + N * 16 (N >= 0) bytes.
Even though the struct gs_host_frame has a size of 76 bytes for a FD
frame, which does not apply to the above rule, corruption could be
seen.
Adding a dummy byte to break the second condition also on transfer
lengths with 4 + N * 8 bytes reliably circumvents USB transfer data
corruption.
The firmware can now request this quirk by setting
GS_CAN_FEATURE_REQ_USB_QUIRK_LPC546XX.
Link: https://lore.kernel.org/all/[email protected]
Signed-off-by: Peter Fink <[email protected]>
Signed-off-by: Christoph Möhring <[email protected]>
Signed-off-by: Alexander Schartner <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
0 files changed, 0 insertions, 0 deletions