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Commit 690629b4 authored by Chandana Kishori Chiluveru's avatar Chandana Kishori Chiluveru Committed by Gerrit - the friendly Code Review server
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usb: gadget: Send BRK signal to host on flow disable ioctl 



Currently in f_cdev driver, we are not handling the TIOCM_CTS
signal generared by SIO_IOCTL_INBOUND_FLOW IOCTL. Hence we
are not able to send BRK signal to the host and it keeps
sending data leading to data loss.

Fix this by handling TIOCM_CTS in the driver.

Change-Id: If8e4774e3e0772cb7189f3400d7e53e258b7d5a3
Signed-off-by: default avatarAjay Agarwal <ajaya@codeaurora.org>
Signed-off-by: default avatarChandana Kishori Chiluveru <cchiluve@codeaurora.org>
parent 49e25df1

drivers/usb/gadget/function/f_cdev.c

+15 −0
Original line number Diff line number Diff line
@@ -1377,6 +1377,9 @@ static int f_cdev_tiocmget(struct f_cdev *port) 


	if (cser->serial_state & TIOCM_DSR)

		result |= TIOCM_DSR;



	if (cser->serial_state & TIOCM_CTS)

		result |= TIOCM_CTS;

	return result;

}
@@ -1423,6 +1426,18 @@ static int f_cdev_tiocmset(struct f_cdev *port, 
	if (clear & TIOCM_DSR)

		cser->serial_state &= ~TIOCM_DSR;



	if (set & TIOCM_CTS) {

		if (cser->send_break) {

			cser->serial_state |= TIOCM_CTS;

			status = cser->send_break(cser, 0);

		}

	}

	if (clear & TIOCM_CTS) {

		if (cser->send_break) {

			cser->serial_state &= ~TIOCM_CTS;

			status = cser->send_break(cser, 1);

		}

	}

	return status;

}