On Wed, Sep 16, 2020 at 10:22:54PM -0700, Sultan Alsawaf wrote: > From: Sultan Alsawaf <sultan@xxxxxxxxxxxxxxx> > > The point of adding a byte to len in i2c_dw_recv_len() is to make sure > that tx_buf_len is nonzero, so that i2c_dw_xfer_msg() can let the i2c > controller know that the i2c transaction can end. Otherwise, the i2c > controller will think that the transaction can never end for block > reads, which results in the stop-detection bit never being set and thus > the transaction timing out. > > Adding a byte to len is not a reliable way to do this though; sometimes > it lets tx_buf_len become zero, which results in the scenario described > above. Therefore, just directly ensure tx_buf_len cannot be zero to fix > the issue. I got only patch 2/4, where the other 3 along with cover letter? -- With Best Regards, Andy Shevchenko
