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| author | Colin Leitner <colin.leitner@googlemail.com> | 2014-01-06 21:33:54 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-07 16:28:43 -0800 |
| commit | c1f15196ac3b541d084dc80a8fbd8a74c6a0bd44 (patch) | |
| tree | 95af331f275796dc541045fae1ef00757bd40503 /fs/hostfs | |
| parent | 30666249eae3b04875d514dea557d1ab1468c006 (diff) | |
| download | linux-c1f15196ac3b541d084dc80a8fbd8a74c6a0bd44.tar.bz2 | |
USB: ftdi_sio: added CS5 quirk for broken smartcard readers
Genuine FTDI chips support only CS7/8. A previous fix in commit
8704211f65a2 ("USB: ftdi_sio: fixed handling of unsupported CSIZE
setting") enforced this limitation and reported it back to userspace.
However, certain types of smartcard readers depend on specific
driver behaviour that requests 0 data bits (not 5) to change into a
different operating mode if CS5 has been set.
This patch reenables this behaviour for all FTDI devices.
Tagged to be added to stable, because it affects a lot of users of
embedded systems which rely on these readers to work properly.
Cc: stable <stable@vger.kernel.org>
Reported-by: Heinrich Siebmanns <H.Siebmanns@t-online.de>
Tested-by: Heinrich Siebmanns <H.Siebmanns@t-online.de>
Signed-off-by: Colin Leitner <colin.leitner@gmail.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/hostfs')
0 files changed, 0 insertions, 0 deletions