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authorJohan Hovold <johan@kernel.org>2021-08-24 14:19:26 +0200
committerJohan Hovold <johan@kernel.org>2021-08-25 09:13:33 +0200
commitdf7b16d1c00ecb3da3a30c999cdb39f273c99a2f (patch)
tree69811bd8779421444f878e1a903db3c1133a61c5
parentUSB: serial: option: add new VID/PID to support Fibocom FG150 (diff)
downloadlinux-df7b16d1c00ecb3da3a30c999cdb39f273c99a2f.tar.xz
linux-df7b16d1c00ecb3da3a30c999cdb39f273c99a2f.zip
Revert "USB: serial: ch341: fix character loss at high transfer rates"
This reverts commit 3c18e9baee0ef97510dcda78c82285f52626764b. These devices do not appear to send a zero-length packet when the transfer size is a multiple of the bulk-endpoint max-packet size. This means that incoming data may not be processed by the driver until a short packet is received or the receive buffer is full. Revert back to using endpoint-sized receive buffers to avoid stalled reads. Reported-by: Paul Größel <pb.g@gmx.de> Link: https://bugzilla.kernel.org/show_bug.cgi?id=214131 Fixes: 3c18e9baee0e ("USB: serial: ch341: fix character loss at high transfer rates") Cc: stable@vger.kernel.org Cc: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20210824121926.19311-1-johan@kernel.org Signed-off-by: Johan Hovold <johan@kernel.org>
-rw-r--r--drivers/usb/serial/ch341.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 8a521b5ea769..2db917eab799 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -851,7 +851,6 @@ static struct usb_serial_driver ch341_device = {
.owner = THIS_MODULE,
.name = "ch341-uart",
},
- .bulk_in_size = 512,
.id_table = id_table,
.num_ports = 1,
.open = ch341_open,