Patch "tty: serial: qcom-geni-serial: Poll primary sequencer irq status after cancel_tx" has been added to the 6.5-stable tree

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This is a note to let you know that I've just added the patch titled

    tty: serial: qcom-geni-serial: Poll primary sequencer irq status after cancel_tx

to the 6.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     tty-serial-qcom-geni-serial-poll-primary-sequencer-i.patch
and it can be found in the queue-6.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9b08f665a19d78b8ba53d827473230ba0906108e
Author: Vijaya Krishna Nivarthi <quic_vnivarth@xxxxxxxxxxx>
Date:   Wed Aug 9 16:23:13 2023 +0530

    tty: serial: qcom-geni-serial: Poll primary sequencer irq status after cancel_tx
    
    [ 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@xxxxxxxxxxx>
    Link: https://lore.kernel.org/r/1691578393-9891-1-git-send-email-quic_vnivarth@xxxxxxxxxxx
    Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 54b22cbc0fcef..67484c062edd1 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,



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