Re: How to resolve an issue in swiotlb environment?

2019-06-12 Thread Oliver Neukum
Am Mittwoch, den 12.06.2019, 09:30 +0200 schrieb Christoph Hellwig: > > So based on the above I'm a little confused about the actual requirement > again. Can you still split the SCSI command into multiple URBs? And Yes. The device sees only a number of packets over the wire. They can come from

Re: Linux crash when using FTDI FT232R USB to serial converter on AMD boards.

2019-05-16 Thread Oliver Neukum
On Do, 2019-05-16 at 14:29 +0200, starost...@gmail.com wrote: > Dne 16.5.2019 v 10:34 Oliver Neukum napsal(a): > > Mention > > > > 1. kernel version > > 2. whether this is known to be a regression > > Sorry for question, can you more specify what you mean

Re: Linux crash when using FTDI FT232R USB to serial converter on AMD boards.

2019-05-16 Thread Oliver Neukum
On Do, 2019-05-16 at 10:20 +0200, starost...@gmail.com wrote: > Dne 16.5.2019 v 9:58 Oliver Neukum napsal(a): > > > > 2.Send a new report to the corresponding mailing list > > > > > > Which mailing list is correct? > > > > In that ca

Re: Linux crash when using FTDI FT232R USB to serial converter on AMD boards.

2019-05-16 Thread Oliver Neukum
On Mi, 2019-05-15 at 16:15 +0200, starost...@gmail.com wrote: > Dne 15.5.2019 v 15:54 Oliver Neukum napsal(a): > > 1. Determine whether the bug depends on the use of an IOMMU > > No, bug not depends on the use of an IOMMU. System crash on both cases. Interesting. > > 2

Re: Linux crash when using FTDI FT232R USB to serial converter on AMD boards.

2019-05-15 Thread Oliver Neukum
On Mi, 2019-05-15 at 13:21 +0200, starost...@gmail.com wrote: > Dne 15.5.2019 v 11:46 Oliver Neukum napsal(a): > > > > Most helpful. First, try to replicate this with the iommu > > disabled. > > > > I am trying this with &qu

Re: Linux crash when using FTDI FT232R USB to serial converter on AMD boards.

2019-05-15 Thread Oliver Neukum
On Mi, 2019-05-15 at 11:43 +0200, starost...@gmail.com wrote: > As I wrote, I made new test on kernel Linux version > 5.1.0-050100-generic amd64: > > https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.1/ > > Same problem, system crash after a few seconds. Full kern.log: > https:

Re: Linux crash when using FTDI FT232R USB to serial converter on AMD boards.

2019-05-15 Thread Oliver Neukum
On Mi, 2019-05-15 at 09:54 +0200, starost...@gmail.com wrote: > Hello, > can I still help with this problem? It's very important for us. Thank you. Your first step would be t verify whether your kernel has the fix coming in the patch Joerg mentioned. Regards Oliver