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drivers/rtc: correct an error test

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rtc is clearly does not satisfy IS_ERR at the point where it is tested, so
I have changed the test to consider the just initialized rtc->rtc_dev.

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

// <smpl>
@match exists@
expression x, E;
identifier fld;
position p1,p2;
@@

(
x = E;
|
x = E
|
x@p1->fld
... when != x = E
IS_ERR(x@p2)
... when any
)

@other_match exists@
expression match.x, E1, E2;
position match.p1,match.p2;
@@

x = E1
... when != x = E2
    when != x@p1
x@p2

@ script:python depends on !other_match@
p1 << match.p1;
p2 << match.p2;
@@

print "* file %s dereference %s test %s" % (p1[0].file,p1[0].line,p2[0].line)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: Bryan Wu <bryan.wu@analog.com>
Cc: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Julia Lawall 2009-01-06 14:42:25 -08:00 committed by Linus Torvalds
parent defb45147b
commit ba6c4033b9
1 changed files with 1 additions and 1 deletions
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2
drivers/rtc/rtc-bfin.c
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@ -390,7 +390,7 @@ static int __devinit bfin_rtc_probe(struct platform_device *pdev)
/* Register our RTC with the RTC framework */
rtc->rtc_dev = rtc_device_register(pdev->name, dev, &bfin_rtc_ops, THIS_MODULE);
if (unlikely(IS_ERR(rtc))) {
if (unlikely(IS_ERR(rtc->rtc_dev))) {
ret = PTR_ERR(rtc->rtc_dev);
goto err_irq;
}