[PATCH v6 6/6] g_NCR5380: Various DTC436 workarounds

2017-06-30 Thread Finn Thain
From: Ondrej Zary Limit PDMA send to 512 B to avoid data corruption on DTC3181E. The corruption is always the same: one byte missing at the beginning of a 128 B block. It happens only with slow Quantum LPS 240 drive, not with faster IBM DORS-32160. It's not clear what

[PATCH v6 6/6] g_NCR5380: Various DTC436 workarounds

2017-06-30 Thread Finn Thain
From: Ondrej Zary Limit PDMA send to 512 B to avoid data corruption on DTC3181E. The corruption is always the same: one byte missing at the beginning of a 128 B block. It happens only with slow Quantum LPS 240 drive, not with faster IBM DORS-32160. It's not clear what causes this. Documentation