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| author | Johan Hovold <johan@kernel.org> | 2021-08-24 14:19:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-03 10:08:13 +0200 |
| commit | 2e098e91eeec782e58dcc543f6c600e347091973 (patch) | |
| tree | cc97c340af336caa50038d7c28c0a0a7d28d2f0e /drivers/usb | |
| parent | 16b281a70a1087a91cc9203c8937f4d31b0c947c (diff) | |
| download | linux-stable-2e098e91eeec782e58dcc543f6c600e347091973.tar.gz linux-stable-2e098e91eeec782e58dcc543f6c600e347091973.tar.bz2 linux-stable-2e098e91eeec782e58dcc543f6c600e347091973.zip | |
Revert "USB: serial: ch341: fix character loss at high transfer rates"
commit df7b16d1c00ecb3da3a30c999cdb39f273c99a2f upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/ch341.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c index e9c39a41faae..a82ba9cc0c72 100644 --- a/drivers/usb/serial/ch341.c +++ b/drivers/usb/serial/ch341.c @@ -678,7 +678,6 @@ 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, |