6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Arnd Bergmann <arnd@xxxxxxxx>
commit b5a23a60e8ab5711f4952912424347bf3864ce8d upstream.
When CONFIG_DMA_ENGINE is disabled, the driver now fails to build:
drivers/tty/serial/amba-pl011.c: In function 'pl011_unthrottle_rx':
drivers/tty/serial/amba-pl011.c:1822:16: error: 'struct uart_amba_port' has no member named 'using_rx_dma'
1822 | if (uap->using_rx_dma) {
| ^~
drivers/tty/serial/amba-pl011.c:1823:20: error: 'struct uart_amba_port' has no member named 'dmacr'
1823 | uap->dmacr |= UART011_RXDMAE;
| ^~
drivers/tty/serial/amba-pl011.c:1824:32: error: 'struct uart_amba_port' has no member named 'dmacr'
1824 | pl011_write(uap->dmacr, uap, REG_DMACR);
| ^~
Add the missing #ifdef check around these field accesses, matching
what other parts of this driver do.
Fixes: 2bcacc1c87ac ("serial: amba-pl011: Fix RX stall when DMA is used")
Cc: stable <stable@xxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202411140617.nkjeHhsK-lkp@xxxxxxxxx/
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Link: https://lore.kernel.org/r/20241115110021.744332-1-arnd@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/amba-pl011.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1819,10 +1819,12 @@ static void pl011_unthrottle_rx(struct u
pl011_write(uap->im, uap, REG_IMSC);
+#ifdef CONFIG_DMA_ENGINE
if (uap->using_rx_dma) {
uap->dmacr |= UART011_RXDMAE;
pl011_write(uap->dmacr, uap, REG_DMACR);
}
+#endif
uart_port_unlock_irqrestore(&uap->port, flags);
}
