linux-toradex.git/drivers/usb/gadget/function, branch v4.2.2

usb: gadget: f_uac2: finalize wMaxPacketSize according to bandwidth

2015-09-21T17:10:52+00:00

commit 913e4a90b6f9687ac0f543e7b632753e4f51c441 upstream.

According to USB Audio Device 2.0 Spec, Ch4.10.1.1:
wMaxPacketSize is defined as follows:
Maximum packet size this endpoint is capable of sending or receiving
when this configuration is selected.
This is determined by the audio bandwidth constraints of the endpoint.

In current code, the wMaxPacketSize is defined as the maximum packet size
for ISO endpoint, and it will let the host reserve much more space than
it really needs, so that we can't let more endpoints work together at
one frame.

We find this issue when we try to let 4 f_uac2 gadgets work together [1]
at FS connection.

[1]http://www.spinics.net/lists/linux-usb/msg123478.html

Acked-by: Daniel Mack 
Cc: andrzej.p@samsung.com
Cc: Daniel Mack 
Cc: tiwai@suse.de
Cc: Alan Stern 
Signed-off-by: Peter Chen 
Signed-off-by: Felipe Balbi 
Signed-off-by: Greg Kroah-Hartman

usb: gadget: f_printer: actually limit the number of instances

2015-07-27T15:19:50+00:00

There is a predefined maximum number of printer instances, currently 4.
A chrdev region is allocated accordingly, but with configfs the user
can create as many printer function directories as they like. To make the
number of printer  instances consistent with the number of allocated
minors, the limit is enforced at directory creation time.

Signed-off-by: Andrzej Pietrasiewicz 
Signed-off-by: Felipe Balbi

usb: gadget: f_hid: actually limit the number of instances

2015-07-27T15:19:50+00:00

There is a predefined maximum number of hid instances, currently 4.
A chrdev region is allocated accordingly, but with configfs the user
can create as many hid function directories as they like. To make
the number of hid instances consistent with the number of allocated minors,
the limit is enforced at directory creation time.

Signed-off-by: Andrzej Pietrasiewicz 
Signed-off-by: Felipe Balbi

usb: gadget: f_uac2: fix calculation of uac2->p_interval

2015-07-27T15:18:06+00:00

The p_interval should be less if the 'bInterval' at the descriptor
is larger, eg, if 'bInterval' is 5 for HS, the p_interval should be
8000 / 16 = 500.

It fixes the patch 9bb87f168931 ("usb: gadget: f_uac2: send
reasonably sized packets")

Cc:  # v3.18+
Fixes: 9bb87f168931 ("usb: gadget: f_uac2: send reasonably sized packets")
Acked-by: Daniel Mack 
Signed-off-by: Peter Chen 
Signed-off-by: Felipe Balbi

usb: gadget: f_midi: fix error recovery path

2015-07-06T17:34:08+00:00

In case kstrdup() fails the resources to release are
midi->in_port[] and midi. No cards have been registered,
so no need to unregister any.

Signed-off-by: Andrzej Pietrasiewicz 
Signed-off-by: Felipe Balbi

usb: gadget: f_fs: do not set cancel function on synchronous {read,write}

2015-07-06T17:34:08+00:00

do not try to set cancel function in synchronous operations in
ffs_epfile_{read,write}_iter.

Cc:  # v4.0+
Acked-by: Al Viro 
Signed-off-by: Rui Miguel Silva 
Signed-off-by: Felipe Balbi

usb: f_mass_storage: limit number of reported LUNs

2015-07-06T17:34:08+00:00

Mass storage function created via configfs always reports eight LUNs
to the hosts even if only one LUN has been configured.  Adjust the
number when the USB function is allocated based on LUNs that user
has created.

Cc: 
Tested-by: Gregory CLEMENT 
Signed-off-by: Michal Nazarewicz 
Signed-off-by: Felipe Balbi

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-05T02:36:06+00:00

Pull more vfs updates from Al Viro:
 "Assorted VFS fixes and related cleanups (IMO the most interesting in
  that part are f_path-related things and Eric's descriptor-related
  stuff).  UFS regression fixes (it got broken last cycle).  9P fixes.
  fs-cache series, DAX patches, Jan's file_remove_suid() work"

[ I'd say this is much more than "fixes and related cleanups".  The
  file_table locking rule change by Eric Dumazet is a rather big and
  fundamental update even if the patch isn't huge.   - Linus ]

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (49 commits)
  9p: cope with bogus responses from server in p9_client_{read,write}
  p9_client_write(): avoid double p9_free_req()
  9p: forgetting to cancel request on interrupted zero-copy RPC
  dax: bdev_direct_access() may sleep
  block: Add support for DAX reads/writes to block devices
  dax: Use copy_from_iter_nocache
  dax: Add block size note to documentation
  fs/file.c: __fget() and dup2() atomicity rules
  fs/file.c: don't acquire files->file_lock in fd_install()
  fs:super:get_anon_bdev: fix race condition could cause dev exceed its upper limitation
  vfs: avoid creation of inode number 0 in get_next_ino
  namei: make set_root_rcu() return void
  make simple_positive() public
  ufs: use dir_pages instead of ufs_dir_pages()
  pagemap.h: move dir_pages() over there
  remove the pointless include of lglock.h
  fs: cleanup slight list_entry abuse
  xfs: Correctly lock inode when removing suid and file capabilities
  fs: Call security_ops->inode_killpriv on truncate
  fs: Provide function telling whether file_remove_privs() will do anything
  ...

vfs: add file_path() helper

2015-06-23T22:00:05+00:00

Turn
	d_path(&file->f_path, ...);
into
	file_path(file, ...);

Signed-off-by: Miklos Szeredi 
Signed-off-by: Al Viro

Merge 4.1-rc7 into usb-next

2015-06-08T17:57:51+00:00

This resolves a merge issue in musb_core.c and we want the fixes that
were in Linus's tree in this branch as well for testing.

Signed-off-by: Greg Kroah-Hartman