diff options
| author | Andrzej Pietrasiewicz <andrzej.p@collabora.com> | 2019-01-31 17:53:40 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2019-02-07 14:14:51 +0300 |
| commit | bdcc03cef0fd8abc6eaeec6ac47e54ae8f8c625f (patch) | |
| tree | 56fae0b1ac05a661572a90da782fe6a56ff576e4 /drivers/usb/gadget/function/f_fs.c | |
| parent | dffe2d7fc45017d7afdb6fc226ff34a537cc285c (diff) | |
| download | linux-bdcc03cef0fd8abc6eaeec6ac47e54ae8f8c625f.tar.xz | |
usb: gadget: f_fs: preserve wMaxPacketSize across usb_ep_autoconfig() call
usb_ep_autoconfig() treats the passed descriptor as if it were an fs
descriptor. In particular, for bulk endpoints, it clips wMaxPacketSize
to 64. This patch preserves the original value.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/gadget/function/f_fs.c')
| -rw-r--r-- | drivers/usb/gadget/function/f_fs.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c index 1e5430438703..66a2c165b4b7 100644 --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -2843,12 +2843,18 @@ static int __ffs_func_bind_do_descs(enum ffs_entity_type type, u8 *valuep, struct usb_request *req; struct usb_ep *ep; u8 bEndpointAddress; + u16 wMaxPacketSize; /* * We back up bEndpointAddress because autoconfig overwrites * it with physical endpoint address. */ bEndpointAddress = ds->bEndpointAddress; + /* + * We back up wMaxPacketSize because autoconfig treats + * endpoint descriptors as if they were full speed. + */ + wMaxPacketSize = ds->wMaxPacketSize; pr_vdebug("autoconfig\n"); ep = usb_ep_autoconfig(func->gadget, ds); if (unlikely(!ep)) @@ -2869,6 +2875,11 @@ static int __ffs_func_bind_do_descs(enum ffs_entity_type type, u8 *valuep, */ if (func->ffs->user_flags & FUNCTIONFS_VIRTUAL_ADDR) ds->bEndpointAddress = bEndpointAddress; + /* + * Restore wMaxPacketSize which was potentially + * overwritten by autoconfig. + */ + ds->wMaxPacketSize = wMaxPacketSize; } ffs_dump_mem(": Rewritten ep desc", ds, ds->bLength); |