11.06.2019 13:51, Bitan Biswas пишет: > Fix expression for residual bytes(less than word) transfer > in I2C PIO mode RX/TX. > > Signed-off-by: Bitan Biswas <bbis...@nvidia.com> > ---
[snip] > /* > - * Update state before writing to FIFO. If this casues us > + * Update state before writing to FIFO. If this causes us > * to finish writing all bytes (AKA buf_remaining goes to 0) we > * have a potential for an interrupt (PACKET_XFER_COMPLETE is > - * not maskable). We need to make sure that the isr sees > - * buf_remaining as 0 and doesn't call us back re-entrantly. > + * not maskable). > */ > buf_remaining -= words_to_transfer * BYTES_PER_FIFO_WORD; Looks like the comment could be removed altogether because it doesn't make sense since interrupt handler is under xfer_lock which is kept locked during of tegra_i2c_xfer_msg(). Moreover the comment says that "PACKET_XFER_COMPLETE is not maskable", but then what I2C_INT_PACKET_XFER_COMPLETE masking does?
