From: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
To: Jia-Ju Bai <baijiaju1990@gmail.com>
Cc: benh@kernel.crashing.org, linux-fbdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] video: fbdev: aty: radeon_pm: Replace mdelay with msleep in radeonfb_pci_suspend
Date: Tue, 24 Apr 2018 15:51:23 +0000 [thread overview]
Message-ID: <7290517.RXRYeCv1u3@amdc3058> (raw)
In-Reply-To: <1523324840-28830-1-git-send-email-baijiaju1990@gmail.com>
On Tuesday, April 10, 2018 09:47:20 AM Jia-Ju Bai wrote:
> radeonfb_pci_suspend() is never called in atomic context.
>
> radeonfb_pci_suspend() is only set as ".suspend" in struct pci_driver.
> This function is not called in atomic context.
>
> Despite never getting called from atomic context, radeonfb_pci_suspend()
> calls mdelay() to busily wait.
> This is not necessary and can be replaced with msleep()
> and usleep_range() to avoid busy waiting.
>
> This is found by a static analysis tool named DCNS written by myself.
> And I also manually check it.
>
> Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Patch queued for 4.18, thanks.
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
prev parent reply other threads:[~2018-04-24 15:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20180410014725epcas1p2f9db790e2df6754f108048b00f399130@epcas1p2.samsung.com>
2018-04-10 1:47 ` [PATCH] video: fbdev: aty: radeon_pm: Replace mdelay with msleep in radeonfb_pci_suspend Jia-Ju Bai
2018-04-24 15:51 ` Bartlomiej Zolnierkiewicz [this message]
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