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| author | Markus Rechberger <mrechberger@gmail.com> | 2009-08-09 21:23:34 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-09-23 06:46:33 -0700 |
| commit | 5971897f3025249c0eea1987fb12efb8c65c93a4 (patch) | |
| tree | 2d6668e35ab42bff36e6de2f616d40e792696491 /drivers/usb/core/devio.c | |
| parent | 7949f4e16456183bae0bc19ffe92072a27d0553e (diff) | |
| download | linux-5971897f3025249c0eea1987fb12efb8c65c93a4.tar.gz linux-5971897f3025249c0eea1987fb12efb8c65c93a4.tar.bz2 linux-5971897f3025249c0eea1987fb12efb8c65c93a4.zip | |
USB: increase usbdevfs max isoc buffer size
The current limit only allows isochronous transfers up to 32kbyte/urb,
updating this to 192 kbyte/urb improves the reliability of the
transfer. USB 2.0 transfer is possible with 32kbyte but increases the
chance of corrupted/incomplete data when the system is performing some
other tasks in the background.
http://www.spinics.net/lists/linux-usb/msg19955.html
Signed-off-by: Markus Rechberger <mrechberger@gmail.com>
Cc: Oliver Neukum <oliver@neukum.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core/devio.c')
| -rw-r--r-- | drivers/usb/core/devio.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index a1add776e89a..71514be8b715 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1091,7 +1091,8 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, } totlen += isopkt[u].length; } - if (totlen > 32768) { + /* 3072 * 64 microframes */ + if (totlen > 196608) { kfree(isopkt); return -EINVAL; } |