On Fri, 3 Jan 2014, Michal Marek wrote: > On 2013-12-02 14:39, Nishanth Menon wrote: > > As indicated by Sekhar in [1], there seems to be a tendency to use > > IS_ERR_VALUE to check the error result for pm_runtime_* functions which > > make no sense considering commit c48cd65 (ARM: OMAP: use consistent > > error checking) - the error values can either be < 0 for error OR > > 0, 1 in cases where we have success. > > > > So, setup a coccinelle script to help identify the same. > > Julia, Gilles, do you have any objections to this semantic patch?
No objections. Acked-by: Julia Lawall <julia.law...@lip6.fr> > > Thanks, > Michal > > > > [1] http://marc.info/?t=138472678100003&r=1&w=2 > > > > Cc: Russell King <rmk+ker...@arm.linux.org.uk> > > Reported-by: Sekhar Nori <nsek...@ti.com> > > Signed-off-by: Nishanth Menon <n...@ti.com> > > --- > > Original post: http://marc.info/?t=138559437300001&r=1&w=2 > > > > scripts/coccinelle/api/pm_runtime.cocci | 109 > > +++++++++++++++++++++++++++++++ > > 1 file changed, 109 insertions(+) > > create mode 100644 scripts/coccinelle/api/pm_runtime.cocci > > > > diff --git a/scripts/coccinelle/api/pm_runtime.cocci > > b/scripts/coccinelle/api/pm_runtime.cocci > > new file mode 100644 > > index 0000000..f01789e > > --- /dev/null > > +++ b/scripts/coccinelle/api/pm_runtime.cocci > > @@ -0,0 +1,109 @@ > > +/// Make sure pm_runtime_* calls does not use unnecessary IS_ERR_VALUE > > +// > > +// Keywords: pm_runtime > > +// Confidence: Medium > > +// Copyright (C) 2013 Texas Instruments Incorporated - GPLv2. > > +// URL: http://coccinelle.lip6.fr/ > > +// Options: --include-headers > > + > > +virtual patch > > +virtual context > > +virtual org > > +virtual report > > + > > +//---------------------------------------------------------- > > +// Detection > > +//---------------------------------------------------------- > > + > > +@runtime_bad_err_handle exists@ > > +expression ret; > > +@@ > > +( > > +ret = \(pm_runtime_idle\| > > + pm_runtime_suspend\| > > + pm_runtime_autosuspend\| > > + pm_runtime_resume\| > > + pm_request_idle\| > > + pm_request_resume\| > > + pm_request_autosuspend\| > > + pm_runtime_get\| > > + pm_runtime_get_sync\| > > + pm_runtime_put\| > > + pm_runtime_put_autosuspend\| > > + pm_runtime_put_sync\| > > + pm_runtime_put_sync_suspend\| > > + pm_runtime_put_sync_autosuspend\| > > + pm_runtime_set_active\| > > + pm_schedule_suspend\| > > + pm_runtime_barrier\| > > + pm_generic_runtime_suspend\| > > + pm_generic_runtime_resume\)(...); > > +... > > +IS_ERR_VALUE(ret) > > +... > > +) > > + > > +//---------------------------------------------------------- > > +// For context mode > > +//---------------------------------------------------------- > > + > > +@depends on runtime_bad_err_handle && context@ > > +identifier pm_runtime_api; > > +expression ret; > > +@@ > > +( > > +ret = pm_runtime_api(...); > > +... > > +* IS_ERR_VALUE(ret) > > +... > > +) > > + > > +//---------------------------------------------------------- > > +// For patch mode > > +//---------------------------------------------------------- > > + > > +@depends on runtime_bad_err_handle && patch@ > > +identifier pm_runtime_api; > > +expression ret; > > +@@ > > +( > > +ret = pm_runtime_api(...); > > +... > > +- IS_ERR_VALUE(ret) > > ++ ret < 0 > > +... > > +) > > + > > +//---------------------------------------------------------- > > +// For org and report mode > > +//---------------------------------------------------------- > > + > > +@r depends on runtime_bad_err_handle exists@ > > +position p1, p2; > > +identifier pm_runtime_api; > > +expression ret; > > +@@ > > +( > > +ret = pm_runtime_api@p1(...); > > +... > > +IS_ERR_VALUE@p2(ret) > > +... > > +) > > + > > +@script:python depends on org@ > > +p1 << r.p1; > > +p2 << r.p2; > > +pm_runtime_api << r.pm_runtime_api; > > +@@ > > + > > +cocci.print_main(pm_runtime_api,p1) > > +cocci.print_secs("IS_ERR_VALUE",p2) > > + > > +@script:python depends on report@ > > +p1 << r.p1; > > +p2 << r.p2; > > +pm_runtime_api << r.pm_runtime_api; > > +@@ > > + > > +msg = "%s returns < 0 as error. Unecessary IS_ERR_VALUE at line %s" % > > (pm_runtime_api, p2[0].line) > > +coccilib.report.print_report(p1[0],msg) > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
