AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-02 15:36:42 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

serial: mxs-auart: fix gpio change detection on interrupt

Browse Source 
mxs_auart_modem_status() did't detect gpio's state change
because s->mctrl_prev was modified before by mctrl_gpio_get().
The patch introduces mctrl_temp variable to fix the bug.

Signed-off-by: Janusz Uzycki <j.uzycki@elproma.com.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Janusz Uzycki 2014-11-14 23:24:33 +01:00 committed by Greg Kroah-Hartman
parent f3006e44dd
commit 08f937f4bc
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/tty/serial/mxs-auart.c
View File

@ -799,6 +799,7 @@ static irqreturn_t mxs_auart_irq_handle(int irq, void *context)
{
u32 istat;
struct mxs_auart_port *s = context;
u32 mctrl_temp = s->mctrl_prev;
u32 stat = readl(s->port.membase + AUART_STAT);
istat = readl(s->port.membase + AUART_INTR);
@ -818,7 +819,7 @@ static irqreturn_t mxs_auart_irq_handle(int irq, void *context)
irq == s->gpio_irq[UART_GPIO_DSR] ||
irq == s->gpio_irq[UART_GPIO_RI])
mxs_auart_modem_status(s,
mctrl_gpio_get(s->gpios, &s->mctrl_prev));
mctrl_gpio_get(s->gpios, &mctrl_temp));
if (istat & AUART_INTR_CTSMIS) {
if (CTS_AT_AUART() && s->ms_irq_enabled)