From: Ronald Wahl Date: Tue, 31 Oct 2023 11:09:09 +0000 (+0100) Subject: serial: 8250: 8250_omap: Clear UART_HAS_RHR_IT_DIS bit X-Git-Tag: v6.6.7~24 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=70dc9a482fbbf04c1952c4446434909a8d190ede;p=platform%2Fkernel%2Flinux-starfive.git serial: 8250: 8250_omap: Clear UART_HAS_RHR_IT_DIS bit commit 8973ab7a2441b286218f4a5c4c33680e2f139996 upstream. This fixes commit 439c7183e5b9 ("serial: 8250: 8250_omap: Disable RX interrupt after DMA enable") which unfortunately set the UART_HAS_RHR_IT_DIS bit in the UART_OMAP_IER2 register and never cleared it. Cc: stable@vger.kernel.org Fixes: 439c7183e5b9 ("serial: 8250: 8250_omap: Disable RX interrupt after DMA enable") Signed-off-by: Ronald Wahl Reviewed-by: Vignesh Raghavendra Link: https://lore.kernel.org/r/20231031110909.11695-1-rwahl@gmx.de Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index ca972fd..c7ab296 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -914,7 +914,7 @@ static void __dma_rx_do_complete(struct uart_8250_port *p) if (priv->habit & UART_HAS_RHR_IT_DIS) { reg = serial_in(p, UART_OMAP_IER2); reg &= ~UART_OMAP_IER2_RHR_IT_DIS; - serial_out(p, UART_OMAP_IER2, UART_OMAP_IER2_RHR_IT_DIS); + serial_out(p, UART_OMAP_IER2, reg); } dmaengine_tx_status(rxchan, cookie, &state); @@ -1060,7 +1060,7 @@ static int omap_8250_rx_dma(struct uart_8250_port *p) if (priv->habit & UART_HAS_RHR_IT_DIS) { reg = serial_in(p, UART_OMAP_IER2); reg |= UART_OMAP_IER2_RHR_IT_DIS; - serial_out(p, UART_OMAP_IER2, UART_OMAP_IER2_RHR_IT_DIS); + serial_out(p, UART_OMAP_IER2, reg); } dma_async_issue_pending(dma->rxchan);