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BACKPORT: usb: gadget: unconditionally allocate hs/ss descriptor in bind operation

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Take f_midi_bind() for example,  when composite layer call it, it will
allocate hs descriptor by calling gadget_is_dualspeed() API to check
gadget max support speed capability, but most other gadget function didn't
do like this.

To follow other function drivers, it is safe to remove the check which
mean support all possible link speed by default in function driver.

Similar change apply to midi2 and uvc.

Also in midi and midi2, as there is no descriptor difference between
super speed and super speed plus, follow other gadget function drivers,
do not allocate descriptor for super speed plus, composite layer will
handle it properly.

Signed-off-by: Linyu Yuan <quic_linyyuan@quicinc.com>
Link: https://lore.kernel.org/r/20230803091053.9714-5-quic_linyyuan@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Bug: 301887900
Change-Id: I8b287266b3973c66e559bd3eea9adbe95e051be7
(cherry picked from commit 46decc82ff
 https://kernel.googlesource.com/pub/scm/linux/kernel/git/gregkh/usb usb-next)
[arakesh: f_midi2.c doesn't exist, so dropped those changes]
Signed-off-by: Avichal Rakesh <arakesh@google.com>
This commit is contained in:
Linyu Yuan
2023-08-03 17:10:50 +08:00
committed by Avichal Rakesh
parent f5beeb23ed
commit ae71397d90
2 changed files with 35 additions and 47 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
drivers/usb/gadget/function/f_midi.c
View File

@@ -1023,40 +1023,30 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f)
if (!f->fs_descriptors)
goto fail_f_midi;
if (gadget_is_dualspeed(c->cdev->gadget)) {
bulk_in_desc.wMaxPacketSize = cpu_to_le16(512);
bulk_out_desc.wMaxPacketSize = cpu_to_le16(512);
f->hs_descriptors = usb_copy_descriptors(midi_function);
if (!f->hs_descriptors)
goto fail_f_midi;
}
bulk_in_desc.wMaxPacketSize = cpu_to_le16(512);
bulk_out_desc.wMaxPacketSize = cpu_to_le16(512);
f->hs_descriptors = usb_copy_descriptors(midi_function);
if (!f->hs_descriptors)
goto fail_f_midi;
if (gadget_is_superspeed(c->cdev->gadget)) {
bulk_in_desc.wMaxPacketSize = cpu_to_le16(1024);
bulk_out_desc.wMaxPacketSize = cpu_to_le16(1024);
i = endpoint_descriptor_index;
midi_function[i++] = (struct usb_descriptor_header *)
&bulk_out_desc;
midi_function[i++] = (struct usb_descriptor_header *)
&bulk_out_ss_comp_desc;
midi_function[i++] = (struct usb_descriptor_header *)
&ms_out_desc;
midi_function[i++] = (struct usb_descriptor_header *)
&bulk_in_desc;
midi_function[i++] = (struct usb_descriptor_header *)
&bulk_in_ss_comp_desc;
midi_function[i++] = (struct usb_descriptor_header *)
&ms_in_desc;
f->ss_descriptors = usb_copy_descriptors(midi_function);
if (!f->ss_descriptors)
goto fail_f_midi;
if (gadget_is_superspeed_plus(c->cdev->gadget)) {
f->ssp_descriptors = usb_copy_descriptors(midi_function);
if (!f->ssp_descriptors)
goto fail_f_midi;
}
}
bulk_in_desc.wMaxPacketSize = cpu_to_le16(1024);
bulk_out_desc.wMaxPacketSize = cpu_to_le16(1024);
i = endpoint_descriptor_index;
midi_function[i++] = (struct usb_descriptor_header *)
&bulk_out_desc;
midi_function[i++] = (struct usb_descriptor_header *)
&bulk_out_ss_comp_desc;
midi_function[i++] = (struct usb_descriptor_header *)
&ms_out_desc;
midi_function[i++] = (struct usb_descriptor_header *)
&bulk_in_desc;
midi_function[i++] = (struct usb_descriptor_header *)
&bulk_in_ss_comp_desc;
midi_function[i++] = (struct usb_descriptor_header *)
&ms_in_desc;
f->ss_descriptors = usb_copy_descriptors(midi_function);
if (!f->ss_descriptors)
goto fail_f_midi;
kfree(midi_function);

26
drivers/usb/gadget/function/f_uvc.c
View File

@@ -718,21 +718,19 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
f->fs_descriptors = NULL;
goto error;
}
if (gadget_is_dualspeed(cdev->gadget)) {
f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH);
if (IS_ERR(f->hs_descriptors)) {
ret = PTR_ERR(f->hs_descriptors);
f->hs_descriptors = NULL;
goto error;
}
f->hs_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_HIGH);
if (IS_ERR(f->hs_descriptors)) {
ret = PTR_ERR(f->hs_descriptors);
f->hs_descriptors = NULL;
goto error;
}
if (gadget_is_superspeed(c->cdev->gadget)) {
f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER);
if (IS_ERR(f->ss_descriptors)) {
ret = PTR_ERR(f->ss_descriptors);
f->ss_descriptors = NULL;
goto error;
}
f->ss_descriptors = uvc_copy_descriptors(uvc, USB_SPEED_SUPER);
if (IS_ERR(f->ss_descriptors)) {
ret = PTR_ERR(f->ss_descriptors);
f->ss_descriptors = NULL;
goto error;
}
/* Preallocate control endpoint request. */