fixup! spi: dw: Wait for idle after TX

pelwell · pelwell · commit fab0093d8845 · 2025-02-04T16:30:43.000Z
Relax a bit harder - transmission of the last bits may take a while.

Signed-off-by: Phil Elwell &lt;phil@raspberrypi.com&gt;
diff --git a/drivers/spi/spi-dw-dma.c b/drivers/spi/spi-dw-dma.c
@@ -305,8 +305,9 @@ static int dw_spi_dma_wait_tx_done(struct dw_spi *dws,
 	}
 
 	if (!xfer->rx_buf) {
+		delay.value = dws->n_bytes * BITS_PER_BYTE;
 		while (dw_readl(dws, DW_SPI_SR) & DW_SPI_SR_BUSY)
-			cpu_relax();
+			spi_delay_exec(&delay, xfer);
 	}
 
 	return 0;

Original file line number	Diff line number	Diff line change
`@@ -305,8 +305,9 @@ static int dw_spi_dma_wait_tx_done(struct dw_spi *dws,`
`305`	`305`	`}`
`306`	`306`
`307`	`307`	`if (!xfer->rx_buf) {`
	`308`	`+ delay.value = dws->n_bytes * BITS_PER_BYTE;`
`308`	`309`	`while (dw_readl(dws, DW_SPI_SR) & DW_SPI_SR_BUSY)`
`309`		`- cpu_relax();`
	`310`	`+ spi_delay_exec(&delay, xfer);`
`310`	`311`	`}`
`311`	`312`
`312`	`313`	`return 0;`