Commit 373b0eb6 authored by Tomoya MORINAGA's avatar Tomoya MORINAGA Committed by Grant Likely

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
...@@ -317,16 +317,19 @@ static void pch_spi_handler_sub(struct pch_spi_data *data, u32 reg_spsr_val, ...@@ -317,16 +317,19 @@ static void pch_spi_handler_sub(struct pch_spi_data *data, u32 reg_spsr_val,
/* if transfer complete interrupt */ /* if transfer complete interrupt */
if (reg_spsr_val & SPSR_FI_BIT) { if (reg_spsr_val & SPSR_FI_BIT) {
if (tx_index < bpw_len) 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 */
data->transfer_complete = true;
data->transfer_active = false;
wake_up(&data->wait);
} else {
dev_err(&data->master->dev, dev_err(&data->master->dev,
"%s : Transfer is not completed", __func__); "%s : Transfer is not completed", __func__);
/* disable interrupts */ }
pch_spi_setclr_reg(data->master, PCH_SPCR, 0, PCH_ALL);
/* transfer is completed;inform pch_spi_process_messages */
data->transfer_complete = true;
data->transfer_active = false;
wake_up(&data->wait);
} }
} }
......
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