6.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Vijaya Krishna Nivarthi quic_vnivarth@quicinc.com
[ Upstream commit 9c8441330bb399cba6177acce9b0e68c0dbaa597 ]
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@quicinc.com Link: https://lore.kernel.org/r/1691578393-9891-1-git-send-email-quic_vnivarth@qui... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 24ebdb0b63a8e..ae632a9d4f3ae 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -592,7 +592,6 @@ 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; @@ -604,12 +603,10 @@ 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,