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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>
This commit is contained in:
John Villalovos 2010-07-20 15:26:46 -07:00 committed by Greg Kroah-Hartman
parent e8dd4757a6
commit 93e3d58284
1 changed files with 1 additions and 1 deletions
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2
include/linux/serial.h
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@ -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)