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USB: gadget: g_serial: append zlp when tx buffer becomes empty
authorDaniel Glöckner <dg@emlix.com>
Thu, 28 May 2009 10:53:24 +0000 (12:53 +0200)
committerGreg Kroah-Hartman <gregkh@suse.de>
Tue, 16 Jun 2009 04:44:46 +0000 (21:44 -0700)
commit2e25134122c25ebb0679b4bbd536fb46c669f9d7
treee839d96eaad759f314517e8ea5e28760dc715347tree | snapshot (tar.gz zip)
parent9b8e7ba68ad0e4273f4897950de65bc311552cd1commit | diff
USB: gadget: g_serial: append zlp when tx buffer becomes empty

Some usb serial host drivers expect a short packet before they forward
the data to the application. This is caused by them trying to read more
than one packet at a time. So when the gadget sends an exact multiple
of the maximum packet size, it should append a zero-length packet.

Signed-off-by: Daniel Glöckner <dg@emlix.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/gadget/u_serial.c diff | blob | blame | history
kernel source for telekom puls (alcatel/mediatek)