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drivers/serial/crisv10.c: add missing put_tty_driver

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alloc_tty_driver is called at the beginning of the function containing the
lines of code shown in the patch.  Thus, put_tty_driver is needed before
returning in the error handling code.

The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@nr exists@
local idexpression x;
expression E,f;
position p1,p2,p3;
identifier l;
statement S;
@@

x = alloc_tty_driver@p1(...)
...
if (x == NULL) S
... when != E = x
    when != put_tty_driver(x)
    when != goto l;
(
return \(0\|x\);
|
return@p3 ...;
)

@script:python@
p1 << nr.p1;
p3 << nr.p3;
@@

print "%s: call on line %s not freed or saved before return on line %s" % (p1[0].file,p1[0].line,p3[0].line)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Julia Lawall 2008-10-13 10:31:37 +01:00 committed by Linus Torvalds
parent 4fa971811c
commit 41ca732298
1 changed files with 2 additions and 0 deletions
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2
drivers/serial/crisv10.c
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@ -4419,6 +4419,7 @@ rs_init(void)
rs485_pa_bit)) {
printk(KERN_CRIT "ETRAX100LX serial: Could not allocate "
"RS485 pin\n");
put_tty_driver(driver);
return -EBUSY;
}
#endif
@ -4427,6 +4428,7 @@ rs_init(void)
rs485_port_g_bit)) {
printk(KERN_CRIT "ETRAX100LX serial: Could not allocate "
"RS485 pin\n");
put_tty_driver(driver);
return -EBUSY;
}
#endif