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platform_kernel-5.15
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tty: sdio_uart: Fix the locking on "func" for new code 

The new dtr_rts function didn't take the port->func lock as it should
so add use of the lock there.


Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox 2009-11-30 13:16:30 +00:00 committed by Greg Kroah-Hartman
parent 4b3b49bb77
commit 1f100b323d
1 changed files with 4 additions and 0 deletions
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4
drivers/mmc/card/sdio_uart.c
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@ -603,10 +603,14 @@ static void uart_dtr_rts(struct tty_port *tport, int onoff)
{ {
struct sdio_uart_port *port = struct sdio_uart_port *port =
container_of(tport, struct sdio_uart_port, port); container_of(tport, struct sdio_uart_port, port);
int ret = sdio_uart_claim_func(port);
if (ret)
return;
if (onoff == 0) if (onoff == 0)
sdio_uart_clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); sdio_uart_clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
else else
sdio_uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS); sdio_uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
sdio_uart_release_func(port);
} }
/** /**