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SubjectRE: [PATCH 4/5 V2] PCI: only return true when dev io state is really changed
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😊  definitely simpler !

-----Original Message-----
From: Joe Perches <joe@perches.com>
Sent: Sunday, September 27, 2020 12:17 PM
To: Zhao, Haifeng <haifeng.zhao@intel.com>; bhelgaas@google.com; oohall@gmail.com; ruscur@russell.cc; lukas@wunner.de; andriy.shevchenko@linux.intel.com; stuart.w.hayes@gmail.com; mr.nuke.me@gmail.com; mika.westerberg@linux.intel.com
Cc: linux-pci@vger.kernel.org; linux-kernel@vger.kernel.org; Jia, Pei P <pei.p.jia@intel.com>; ashok.raj@linux.intel.com; Kuppuswamy, Sathyanarayanan <sathyanarayanan.kuppuswamy@intel.com>
Subject: Re: [PATCH 4/5 V2] PCI: only return true when dev io state is really changed

On Sat, 2020-09-26 at 23:28 -0400, Ethan Zhao wrote:
> simplify the pci_dev_set_io_state() function to only return true when
> dev->error_state is changed.
[]
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
[]
> @@ -362,35 +362,11 @@ static inline bool pci_dev_set_io_state(struct pci_dev *dev,
> bool changed = false;
[]
> + if (dev->error_state == new)
> + return changed;
> +
> + dev->error_state = new;
> + changed = true;
> return changed;
> }

This would be simpler removing the unnecessary changed automatic

...

if (dev->error_state == new)
return false;

dev->error_state = new;

return true;
}


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