This patch changes the bDeviceClass, bDeviceSubClass, bDeviceProtocol
to match the real class and protocol instead of leaving it as per
interface.
Signed-off-by: Michal Nazarewicz <m.nazarewicz@xxxxxxxxxxx>
Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
Hello Alan,
Each time I see the device descriptor of the File Storage Gadget
I wonder if it shouldn't be set to the real value rather then leaving
it as per interface.
Is there a reason to leave it as per interface? Will chenging it to
the real value change anything?
I checked my pendrive and an IDE<->USB adapter they as well use a per
interface class but maybe it'll be better to use proper call any way?
drivers/usb/gadget/file_storage.c | 6 +++++-
drivers/usb/gadget/mass_storage.c | 4 +++-
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index d57c09f..1f76ea0 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -544,7 +544,9 @@ device_desc = {
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = cpu_to_le16(0x0200),
- .bDeviceClass = USB_CLASS_PER_INTERFACE,
+ .bDeviceClass = USB_CLASS_MASS_STORAGE,
+ .bDeviceSubClass = USB_SC_SCSI, /* Adjusted during fsg_bind() */
+ .bDeviceProtocol = USB_PR_BULK, /* Adjusted during fsg_bind() */
/* The next three values can be overridden by module parameters */
.idVendor = cpu_to_le16(FSG_VENDOR_ID),
@@ -3450,7 +3452,9 @@ static int __ref fsg_bind(struct usb_gadget *gadget)
i = (transport_is_cbi() ? 3 : 2); // Number of endpoints
fsg_intf_desc.bNumEndpoints = i;
fsg_intf_desc.bInterfaceSubClass = mod_data.protocol_type;
+ device_desc.bDeviceSubClass = mod_data.protocol_type;
fsg_intf_desc.bInterfaceProtocol = mod_data.transport_type;
+ device_desc.bDeviceProtocol = mod_data.transport_type;
fsg_fs_function[i + FSG_FS_FUNCTION_PRE_EP_ENTRIES] = NULL;
if (gadget_is_dualspeed(gadget)) {
diff --git a/drivers/usb/gadget/mass_storage.c b/drivers/usb/gadget/mass_storage.c
index 585f255..59054a4 100644
--- a/drivers/usb/gadget/mass_storage.c
+++ b/drivers/usb/gadget/mass_storage.c
@@ -70,7 +70,9 @@ static struct usb_device_descriptor msg_device_desc = {
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = cpu_to_le16(0x0200),
- .bDeviceClass = USB_CLASS_PER_INTERFACE,
+ .bDeviceClass = USB_CLASS_MASS_STORAGE,
+ .bDeviceSubClass = USB_SC_SCSI,
+ .bDeviceProtocol = USB_PR_BULK,
/* Vendor and product id can be overridden by module parameters. */
.idVendor = cpu_to_le16(FSG_VENDOR_ID),
--
1.7.1
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