[PATCH v2 4/5] USB: gadget: f_fs: add SuperSpeed Plus support - Greg Kroah-Hartman

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: balbi@kernel.org
Cc: peter.chen@nxp.com, willmcvicker@google.com,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	"taehyun.cho" <taehyun.cho@samsung.com>,
	stable <stable@vger.kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH v2 4/5] USB: gadget: f_fs: add SuperSpeed Plus support
Date: Fri, 27 Nov 2020 15:05:58 +0100	[thread overview]
Message-ID: <20201127140559.381351-5-gregkh@linuxfoundation.org> (raw)
In-Reply-To: <20201127140559.381351-1-gregkh@linuxfoundation.org>

From: "taehyun.cho" <taehyun.cho@samsung.com>

Setup the descriptors for SuperSpeed Plus for f_fs. This allows the
gadget to work properly without crashing at SuperSpeed rates.

Cc: Felipe Balbi <balbi@kernel.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: taehyun.cho <taehyun.cho@samsung.com>
Signed-off-by: Will McVicker <willmcvicker@google.com>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/gadget/function/f_fs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 046f770a76da..a34a7c96a1ab 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -1327,6 +1327,7 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,
 		struct usb_endpoint_descriptor *desc;
 
 		switch (epfile->ffs->gadget->speed) {
+		case USB_SPEED_SUPER_PLUS:
 		case USB_SPEED_SUPER:
 			desc_idx = 2;
 			break;
@@ -3222,6 +3223,10 @@ static int _ffs_func_bind(struct usb_configuration *c,
 	func->function.os_desc_n =
 		c->cdev->use_os_string ? ffs->interfaces_count : 0;
 
+	if (likely(super)) {
+		func->function.ssp_descriptors =
+			usb_copy_descriptors(func->function.ss_descriptors);
+	}
 	/* And we're done */
 	ffs_event_add(ffs, FUNCTIONFS_BIND);
 	return 0;
-- 
2.29.2

