David Brownell 934da4635c
usb: cdc-acm: stop dropping tx buffers ...
The "increase cdc-acm write throughput" patch left in place two
now-obsolete mechanisms, either of which can make the cdc-acm
driver drop TX data (nasty!). This patch removes them:
- The write_ready flag ... if an URB and buffer were found,
they can (and should!) always be used.
- TX path acm_wb_is_used() ... used when the buffer was just
allocated, so that check is pointless.
Also fix a won't-yet-matter leak of a write buffer on a disconnect path.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net >
Cc: David Engraf <david.engraf@netcom.eu >
Acked-by: Oliver Neukum <oneukum@suse.de >
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de >
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934da4635c