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char: Fix return type of qemu_chr_fe_add_watch() 

qemu_chr_fe_add_watch() can return negative errors, therefore it must
not have an unsigned return type. For consistency with other
qemu_chr_fe_* functions, this uses a standard C int instead of glib
types.

In situations where qemu_chr_fe_add_watch() is falsely assumed to have
succeeded, the serial ports would go into a state where it never becomes
ready for transmitting more data; this is fixed by this patch.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Kevin Wolf 2013-03-19 13:38:09 +01:00 committed by Anthony Liguori
parent f628926bb4
commit 2c8a59422c
2 changed files with 4 additions and 4 deletions
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4
include/char/char.h
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@ -153,8 +153,8 @@ void qemu_chr_fe_close(struct CharDriverState *chr);
void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
GCC_FMT_ATTR(2, 3);
guint qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
GIOFunc func, void *user_data);
int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
GIOFunc func, void *user_data);
/**
* @qemu_chr_fe_write:

4
qemu-char.c
View File

@ -3397,8 +3397,8 @@ void qemu_chr_fe_close(struct CharDriverState *chr)
}
}
guint qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
GIOFunc func, void *user_data)
int qemu_chr_fe_add_watch(CharDriverState *s, GIOCondition cond,
GIOFunc func, void *user_data)
{
GSource *src;
guint tag;