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Commit 373b0eb6 authored by Tomoya MORINAGA's avatar Tomoya MORINAGA Committed by Grant Likely
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spi-topcliff-pch: Fix CPU read complete condition issue 



We found Rx data sometimes drops.(with non-DMA transfer mode)
The cause is read complete condition is not true.

This patch fixes the issue.

Signed-off-by: default avatarTomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
parent 8b7aa961

drivers/spi/spi-topcliff-pch.c

+11 −8
Original line number Diff line number Diff line
@@ -317,16 +317,19 @@ static void pch_spi_handler_sub(struct pch_spi_data *data, u32 reg_spsr_val, 


	/* if transfer complete interrupt */

	if (reg_spsr_val & SPSR_FI_BIT) {

		if (tx_index < bpw_len)

			dev_err(&data->master->dev,

				"%s : Transfer is not completed", __func__);

		if ((tx_index == bpw_len) && (rx_index == tx_index)) {

			/* disable interrupts */

			pch_spi_setclr_reg(data->master, PCH_SPCR, 0, PCH_ALL);



		/* transfer is completed;inform pch_spi_process_messages */

			/* transfer is completed;

			   inform pch_spi_process_messages */

			data->transfer_complete = true;

			data->transfer_active = false;

			wake_up(&data->wait);

		} else {

			dev_err(&data->master->dev,

				"%s : Transfer is not completed", __func__);

		}

	}

}