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| author | John Villalovos <jvillalo@redhat.com> | 2010-07-21 02:26:46 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-11 00:47:45 +0400 |
| commit | 93e3d58284626ff6466f9c3dac8800cd6f8079c6 (patch) | |
| tree | 4ac91dfa0fe4d485a81439dbb4118978d9cf3cb2 /include | |
| parent | e8dd4757a6cf0a8909148a61b89fa3a6d4f9b3ee (diff) | |
| download | linux-93e3d58284626ff6466f9c3dac8800cd6f8079c6.tar.xz | |
serial: fix missing bit coverage of ASYNC_FLAGS
It seems that currently ASYNC_FLAGS is one bit short of covering all the
bits of the ASYNC user flags. In particular it does not cover the
ASYNC_AUTOPROBE bit.
ASYNCB_LAST_USER and ASYNCB_AUTOPROBE are both equal to 15.
Therefore:
ASYNC_AUTOPROBE = 1000 0000 0000 0000
ASYNC_FLAGS = 0111 1111 1111 1111
So ASYNC_FLAGS is not covering the ASYNC_AUTOPROBE bit.
This patch fixes the issue and with the patch the values will be:
ASYNC_AUTOPROBE = 1000 0000 0000 0000
ASYNC_FLAGS = 1111 1111 1111 1111
As a side note, doing a "git grep" I didn't find any use of
ASYNC_AUTOPROBE or ASYNCB_AUTOPROBE in the kernel, besides this include
file.
Signed-off-by: John Villalovos <john.l.villalovos@intel.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/serial.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/serial.h b/include/linux/serial.h index c8613c3ff9d3..c3b45add494d 100644 --- a/include/linux/serial.h +++ b/include/linux/serial.h @@ -151,7 +151,7 @@ struct serial_uart_config { #define ASYNC_BUGGY_UART (1U << ASYNCB_BUGGY_UART) #define ASYNC_AUTOPROBE (1U << ASYNCB_AUTOPROBE) -#define ASYNC_FLAGS ((1U << ASYNCB_LAST_USER) - 1) +#define ASYNC_FLAGS ((1U << (ASYNCB_LAST_USER + 1)) - 1) #define ASYNC_USR_MASK (ASYNC_SPD_HI|ASYNC_SPD_VHI| \ ASYNC_CALLOUT_NOHUP|ASYNC_SPD_SHI|ASYNC_LOW_LATENCY) #define ASYNC_SPD_CUST (ASYNC_SPD_HI|ASYNC_SPD_VHI) |