From mboxrd@z Thu Jan 1 00:00:00 1970 From: "xinhui.pan" Subject: Re: [PATCH] i2c-designware-pcidrv: fix the incorrect return of idle callback Date: Wed, 29 Jan 2014 10:03:33 +0800 Message-ID: <52E86175.6010300@intel.com> References: <52E744AC.2050606@intel.com> <20140128183035.GC20789@katana> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20140128183035.GC20789@katana> Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Wolfram Sang Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, mika.westerberg-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, andriy.shevchenko-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, yanmin_zhang-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, bo.he-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org List-Id: linux-i2c@vger.kernel.org > On Tue, Jan 28, 2014 at 01:48:28PM +0800, xinhui.pan wrote: >> From: "xinhui.pan" >> >> i2c_dw_pci_runtime_idle should return -EBUSY rather than zero if it do success. > > I don't understand... > Sorry for my poor English. Even if i2c_dw_pci_runtime_idle succeed ,it should return -EBUSY. >> Otherwise rpm_idle will call pm_suspend again and that may cause pm_schedule_suspend delay invalidate. >> >> Signed-off-by: bo.he >> Signed-off-by: xinhui.pan >> --- >> drivers/i2c/busses/i2c-designware-pcidrv.c | 4 ++-- >> 1 file changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c >> index f6ed06c..96e81f6 100644 >> --- a/drivers/i2c/busses/i2c-designware-pcidrv.c >> +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c >> @@ -190,8 +190,8 @@ static int i2c_dw_pci_runtime_idle(struct device *dev) >> int err = pm_schedule_suspend(dev, 500); >> dev_dbg(dev, "runtime_idle called\n"); >> >> - if (err != 0) >> - return 0; >> + if (err) >> + return err; >> return -EBUSY; > > ... it does return EBUSY when pm_schedule_suspend() succeeds? It only > returns 0 if it does not succeed (for which I don't know if this is an > apropriate behaviour). Mika? > >> } >> >> -- >> 1.7.9.5