Zephyr: USB mass demo format fails on frdm_k64f

[MarkWangChinese]

Describe the bug
with the native kinetis usb controller driver, the mass demo runs unstable.

To Reproduce
Steps to reproduce the behavior:

1. Increase the ram disk size by changing #define RAMDISK_VOLUME_SIZE (32 * 512) to #define RAMDISK_VOLUME_SIZE (300 * 512) in file fat12_ramdisk.h
2. Execute the command line: cmake -GNinja -DOVERLAY_CONFIG="overlay-ram-disk.conf" -DBOARD=frdm_k64f ..
3. build and download the demo to board.
4. Connect to PC (windows), and format the disk, it will fail. my PC is Win10.

Environment (please complete the following information):

• OS: Windows
• Toolchain: arm gcc in windows.
• 0bed1007edc1c73dbe3e84263cdd99cd09ed7c48

[MarkWangChinese]

@jfischer-phytec-iot Do you have time to check it? or I will check it later. I tried the shim driver, and it is OK.

[jfischer-no]

Work fine for me, tested on Linux.

dd if=/dev/urandom of=test.img bs=512 count=300
dd if=test.img of=/dev/sdd bs=512 count=300
dd of=test1.img if=/dev/sdd bs=512 count=300
diff test1.img test.img

I had to disable MPU. I usually have problems on the frdm_k64f when MPU is enabled. Bisect identified aa826960d89e066bd2219b0576a0c4f3a475cb3f, but I did not have more time to investigate.

[ioannisg]

There have been some recent MPU fixes in #17603: @jfischer-phytec-iot, could you check if this still needs MPU to be disabled, in order to work?

[agansari]

@MarkWangChinese @jfischer-phytec-iot i've added a new pull #17834 that should fix USB's MPU access to RAM, not sure about formatting in Windows. Can you please test?
USB is a different master (4) than ethernet (3) @ioannisg.

[ioannisg]

@MarkWangChinese @jfischer-phytec-iot can you test this new patch?
Thanks @agansari

[MarkWangChinese]

Yes, I do one simple test, it seems fix the issue. I will do more testes later (today), and give the result.

[ioannisg]

Yes, I do one simple test, it seems fix the issue. I will do more testes later (today), and give the result.

Thanks @MarkWangChinese , let us know of the result of your testing!

[MarkWangChinese]

I did the test and it solved this issue.

[ioannisg]

Then it seems we are good to go FWIW, I ran the complete sanitycheck on frdm-k64f on the related PR, to confirm that no tests are affected.