diff options
| author | Stephane Grosjean <s.grosjean@peak-system.com> | 2018-06-21 15:23:31 +0200 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2018-07-23 14:34:45 +0200 |
| commit | 5d4c94ed9f564224d7b37dbee13f7c5d4a8a01ac (patch) | |
| tree | e8a0111772874e1ca329d7f0a17cc389c7e72eaa /arch/mips/kernel/process.c | |
| parent | c9ce1fa1c24b08e13c2a3b5b1f94a19c9eaa982c (diff) | |
can: peak_canfd: fix firmware < v3.3.0: limit allocation to 32-bit DMA addr only
The DMA logic in firmwares < v3.3.0 embedded in the PCAN-PCIe FD cards
family is not capable of handling a mix of 32-bit and 64-bit logical
addresses. If the board is equipped with 2 or 4 CAN ports, then such a
situation might lead to a PCIe Bus Error "Malformed TLP" packet
as well as "irq xx: nobody cared" issue.
This patch adds a workaround that requests only 32-bit DMA addresses
when these might be allocated outside of the 4 GB area.
This issue has been fixed in firmware v3.3.0 and next.
Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'arch/mips/kernel/process.c')
0 files changed, 0 insertions, 0 deletions