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| author | Dave Airlie <airlied@redhat.com> | 2024-11-04 14:25:33 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2024-11-04 14:25:33 +1000 |
| commit | 30169bb64580bd7bce9290c1952bf0aa6cc37fe5 (patch) | |
| tree | 94c6ab9dec68f5648a055752aad32d816bd27e11 /drivers/tty/serial/imx.c | |
| parent | bcfe43f0ea77c42c2154fb79b99b7d1d82ac3231 (diff) | |
| parent | 59b723cd2adbac2a34fc8e12c74ae26ae45bf230 (diff) | |
| download | lwn-30169bb64580bd7bce9290c1952bf0aa6cc37fe5.tar.gz lwn-30169bb64580bd7bce9290c1952bf0aa6cc37fe5.zip | |
Backmerge v6.12-rc6 of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into drm-next
Backmerge Linus tree for some drm-fixes needed for msm and xe merges.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/tty/serial/imx.c')
| -rw-r--r-- | drivers/tty/serial/imx.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 67d4a72eda77..90974d338f3c 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -762,6 +762,21 @@ static irqreturn_t __imx_uart_rtsint(int irq, void *dev_id) imx_uart_writel(sport, USR1_RTSD, USR1); usr1 = imx_uart_readl(sport, USR1) & USR1_RTSS; + /* + * Update sport->old_status here, so any follow-up calls to + * imx_uart_mctrl_check() will be able to recognize that RTS + * state changed since last imx_uart_mctrl_check() call. + * + * In case RTS has been detected as asserted here and later on + * deasserted by the time imx_uart_mctrl_check() was called, + * imx_uart_mctrl_check() can detect the RTS state change and + * trigger uart_handle_cts_change() to unblock the port for + * further TX transfers. + */ + if (usr1 & USR1_RTSS) + sport->old_status |= TIOCM_CTS; + else + sport->old_status &= ~TIOCM_CTS; uart_handle_cts_change(&sport->port, usr1); wake_up_interruptible(&sport->port.state->port.delta_msr_wait); |