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authorStephane Grosjean <[email protected]>2018-06-21 15:23:31 +0200
committerMarc Kleine-Budde <[email protected]>2018-07-23 14:34:45 +0200
commit5d4c94ed9f564224d7b37dbee13f7c5d4a8a01ac (patch)
treee8a0111772874e1ca329d7f0a17cc389c7e72eaa /scripts/gdb/linux/cpus.py
parentc9ce1fa1c24b08e13c2a3b5b1f94a19c9eaa982c (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 <[email protected]> Cc: linux-stable <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
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