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serial: pl011: Request a memory width of 1 byte

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In order to avoid losing residue bytes when a receive is terminated
early, set the destination width to single bytes.

Link: https://github.com/raspberrypi/linux/issues/6365

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
This commit is contained in:
Phil Elwell
2024-09-19 18:22:24 +01:00
committed by Dom Cobley
parent 21c6e78a2e
commit 308ccee2e9
1 changed files with 1 additions and 0 deletions
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1
drivers/tty/serial/amba-pl011.c
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@@ -475,6 +475,7 @@ static void pl011_dma_probe(struct uart_amba_port *uap)
.src_addr = uap->port.mapbase +
pl011_reg_to_offset(uap, REG_DR),
.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE,
.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE,
.direction = DMA_DEV_TO_MEM,
.src_maxburst = uap->fifosize >> 2,
.device_fc = false,