sata_sil24: swiotlb buffer is full ?

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Hello,

I have some disks attached to a "Silicon Image, Inc. SiI 3124 PCI-X Serial ATA Controller" and it repeatedly locks up the system with the message whenever there is heavy disk i/o. The system the controller is attached to is a via EPIA-M910 board.

sata_sil24: 0000:06:03.0: swiotlb buffer is full: 65536 bytes)
DMA: Out of SW-IOMMU space for 65536 bytes at device .."
sata_sil24 0000:06:03.0: swiotlb buffer is full (sz: 65536 bytes .."

For the past week I have been running with two additional boot parameters (iommu=allowdac swiotlb=131072) which seem to have solved the issue, but I was curious if this is a driver bug or not?

Thanks,
Andrew
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