Re: [PATCH v2] Revert "mmc: dw_mmc: Extract FIFO data transfer into a separate routine"

On Tue, 08 Oct 2024 19:18:31 +0000, Jonas Karlman wrote:

The commit 0252924ac6d4 ("mmc: dw_mmc: Extract FIFO data transfer into a separate routine") unintentionally changed behavior of the FIFO data transfer routine.

When data is read and size reaches 0 the original loop would wait on DWMCI_INTMSK_DTO or timeout. The remaining size to read and buf position is no longer tracked across dwmci_data_transfer_fifo() calls and because of this an extra call to fifo() and dwmci_fifo_ready() may now trigger a FIFO underflow timeout error and slows down FIFO reading.

[...]

Applied to u-boot/master, thanks!