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Message-Id: <1691583100-15689-1-git-send-email-quic_vnivarth@quicinc.com>
Date: Wed, 9 Aug 2023 17:41:40 +0530
From: Vijaya Krishna Nivarthi <quic_vnivarth@...cinc.com>
To: agross@...nel.org, bjorn.andersson@...nel.org,
konrad.dybcio@...aro.org, gregkh@...uxfoundation.org,
jirislaby@...nel.org, bartosz.golaszewski@...aro.org,
linux-arm-msm@...r.kernel.org, linux-serial@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: quic_msavaliy@...cinc.com, dianders@...omium.org, mka@...omium.org,
swboyd@...omium.org, quic_vtanuku@...cinc.com,
Vijaya Krishna Nivarthi <quic_vnivarth@...cinc.com>
Subject: [PATCH RESEND] tty: serial: qcom-geni-serial: Poll primary sequencer irq status after cancel_tx
TX is handled by primary sequencer. After cancelling primary command, poll
primary sequencer's irq status instead of that of secondary.
While at it, also remove a couple of redundant lines that read from IRQ_EN
register and write back same.
Fixes: 2aaa43c70778 ("tty: serial: qcom-geni-serial: add support for serial engine DMA")
Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@...cinc.com>
---
drivers/tty/serial/qcom_geni_serial.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 3ca5db2..b8aa4c1 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -591,7 +591,6 @@ static void qcom_geni_serial_stop_tx_dma(struct uart_port *uport)
{
struct qcom_geni_serial_port *port = to_dev_port(uport);
bool done;
- u32 m_irq_en;
if (!qcom_geni_serial_main_active(uport))
return;
@@ -603,12 +602,10 @@ static void qcom_geni_serial_stop_tx_dma(struct uart_port *uport)
port->tx_remaining = 0;
}
- m_irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN);
- writel(m_irq_en, uport->membase + SE_GENI_M_IRQ_EN);
geni_se_cancel_m_cmd(&port->se);
- done = qcom_geni_serial_poll_bit(uport, SE_GENI_S_IRQ_STATUS,
- S_CMD_CANCEL_EN, true);
+ done = qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS,
+ M_CMD_CANCEL_EN, true);
if (!done) {
geni_se_abort_m_cmd(&port->se);
done = qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS,
--
2.7.4
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