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Commit 83e10419 authored by Harsh Agarwal's avatar Harsh Agarwal Committed by Gerrit - the friendly Code Review server
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usb: dwc3-msm: Prevent switch to peripheral for host-mode only core 



Currently certain platforms have cores which are only host-mode
compatible. Prevent switch to peripharal mode for such cores so
as to prevent unanticipated core behavior and crashes.

Change-Id: I163e878bfe7428ed339409adb8a491a6673ca055
Signed-off-by: default avatarHarsh Agarwal <harshq@codeaurora.org>
parent 84df7e40

drivers/usb/dwc3/dwc3-msm.c

+6 −0
Original line number Diff line number Diff line
@@ -3869,8 +3869,14 @@ static ssize_t mode_store(struct device *dev, struct device_attribute *attr, 
		const char *buf, size_t count)

{

	struct dwc3_msm *mdwc = dev_get_drvdata(dev);

	struct dwc3 *dwc = platform_get_drvdata(mdwc->dwc3);



	if (sysfs_streq(buf, "peripheral")) {

		if (dwc->dr_mode == USB_DR_MODE_HOST) {

			dev_err(dev, "Core supports host mode only.\n");

			return -EINVAL;

		}



		mdwc->vbus_active = true;

		mdwc->id_state = DWC3_ID_FLOAT;

	} else if (sysfs_streq(buf, "host")) {