FunctionFS is very specific, because read/write operations are
directly translated into USB requests, which are asynchronous, so
you cannot use O_NONBLOCK.
If you need non-blocking API you can use Asynchronous I/O (AIO). You
can find some examples in kernel sources
Thank you, that sounds like the best approach.
In this case I think perhaps the long wait without any data is an
problem with the imx6 Chipidea USB controller.
What's the possible problem?
Sorry for the delay in replying, I have been getting some more
details with a USB
FunctionFS is very specific, because read/write operations are
directly translated into USB requests, which are asynchronous, so
you cannot use O_NONBLOCK.
If you need non-blocking API you can use Asynchronous I/O (AIO). You
can find some examples in kernel sources
On Wed, Apr 01, 2015 at 06:29:05PM +0100, Baxter, Jim wrote:
FunctionFS is very specific, because read/write operations are directly
translated into USB requests, which are asynchronous, so you cannot use
O_NONBLOCK.
If you need non-blocking API you can use Asynchronous I/O (AIO). You can
Hi,
On 03/31/2015 08:53 PM, Baxter, Jim wrote:
Hi,
I have been looking at an issue where a phone that is the Function FS
host sometimes locks up and causes the function:
static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data
*io_data) in drivers/usb/gadget/function/f_fs.c to
On Wed, Apr 01, 2015 at 06:29:05PM +0100, Baxter, Jim wrote:
FunctionFS is very specific, because read/write operations are directly
translated into USB requests, which are asynchronous, so you cannot use
O_NONBLOCK.
If you need non-blocking API you can use Asynchronous I/O (AIO).
FunctionFS is very specific, because read/write operations are directly
translated into USB requests, which are asynchronous, so you cannot use
O_NONBLOCK.
If you need non-blocking API you can use Asynchronous I/O (AIO). You can
find some examples in kernel sources
Hi,
I have been looking at an issue where a phone that is the Function FS
host sometimes locks up and causes the function:
static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data
*io_data) in drivers/usb/gadget/function/f_fs.c to timeout after
MAX_SCHEDULE_TIMEOUT jiffies.
We are
Hi,
(it helps if you Cc the maintainer too :-)
On Tue, Mar 31, 2015 at 07:53:39PM +0100, Baxter, Jim wrote:
I have been looking at an issue where a phone that is the Function FS
host sometimes locks up and causes the function:
which USB controller ? which kernel ? which platform ?
static
