Lars-Peter Clausen 332a5b446b usb: gadget: f_fs: Fix EFAULT generation for async read operations ... In the current implementation functionfs generates a EFAULT for async read operations if the read buffer size is larger than the URB data size. Since a application does not necessarily know how much data the host side is going to send it typically supplies a buffer larger than the actual data, which will then result in a EFAULT error. This behaviour was introduced while refactoring the code to use iov_iter interface in commit c993c39b86 ("gadget/function/f_fs.c: use put iov_iter into io_data"). The original code took the minimum over the URB size and the user buffer size and then attempted to copy that many bytes using copy_to_user(). If copy_to_user() could not copy all data a EFAULT error was generated. Restore the original behaviour by only generating a EFAULT error when the number of bytes copied is not the size of the URB and the target buffer has not been fully filled. Commit 342f39a6c8 ("usb: gadget: f_fs: fix check in read operation") already fixed the same problem for the synchronous read path. Fixes: c993c39b86 ("gadget/function/f_fs.c: use put iov_iter into io_data") Acked-by: Michal Nazarewicz <mina86@mina86.com> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>		2016-04-19 11:11:56 +03:00
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function	usb: gadget: f_fs: Fix EFAULT generation for async read operations	2016-04-19 11:11:56 +03:00
legacy	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
udc	usb: gadget: r8a66597-udc: Deinline pipe_change, save 2176 bytes	2016-04-19 11:11:55 +03:00
composite.c	usb: gadget: composite: Access SSP Dev Cap fields properly	2016-03-29 13:25:57 +03:00
config.c	usb: gadget: Update function for SuperSpeedPlus	2016-03-04 15:14:23 +02:00
configfs.c	Configfs changes for the 4.6 merge window:	2016-03-17 16:25:46 -07:00
configfs.h	usb: gadget: OS descriptors: provide interface directory names	2014-06-19 10:06:48 -05:00
epautoconf.c	usb: gadget: epautoconf: add usb_ep_autoconfig_release() function	2015-09-27 10:54:31 -05:00
functions.c	usb: gadget: add a forward pointer from usb_function to its "instance"	2013-01-21 20:52:46 +02:00
Kconfig	usb: common: rework CONFIG_USB_COMMON logic	2016-04-18 15:23:36 +03:00
Makefile	usb: gadget: use $(srctree) instead of $(PWD) for includes	2014-08-29 15:53:46 -05:00
u_f.c	usb: gadget: define free_ep_req as universal function	2015-12-15 09:12:41 -06:00
u_f.h	usb: gadget: define free_ep_req as universal function	2015-12-15 09:12:41 -06:00
u_os_desc.h	usb: gadget: u_os_desc: helper functions for accessing ext prop buffer	2014-07-10 08:36:51 -05:00
usbstring.c	usb: delete non-required instances of include <linux/init.h>	2014-01-08 15:01:39 -08:00