linux-kernel - Re: [PATCH] fbdev: sm712fb: handle ioremap() errors in probe

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Date:   Tue, 8 Sep 2020 13:36:36 +0200
From:   Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:     Evgeny Novikov <novikov@...ras.ru>
Cc:     Sudip Mukherjee <sudipm.mukherjee@...il.com>,
        Teddy Wang <teddy.wang@...iconmotion.com>,
        linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org
Subject: Re: [PATCH] fbdev: sm712fb: handle ioremap() errors in probe


On 7/13/20 10:05 AM, Evgeny Novikov wrote:
> smtcfb_pci_probe() does not handle ioremap() errors for case 0x720. The
> patch fixes that exactly like for case 0x710/2.
> 
> Found by Linux Driver Verification project (linuxtesting.org).
> 
> Signed-off-by: Evgeny Novikov <novikov@...ras.ru>

Applied to drm-misc-next tree, thanks and sorry for the delay.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

> ---
>  drivers/video/fbdev/sm712fb.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/video/fbdev/sm712fb.c b/drivers/video/fbdev/sm712fb.c
> index 6a1b4a853d9e..0171b23fa211 100644
> --- a/drivers/video/fbdev/sm712fb.c
> +++ b/drivers/video/fbdev/sm712fb.c
> @@ -1602,6 +1602,14 @@ static int smtcfb_pci_probe(struct pci_dev *pdev,
>  		sfb->fb->fix.mmio_start = mmio_base;
>  		sfb->fb->fix.mmio_len = 0x00200000;
>  		sfb->dp_regs = ioremap(mmio_base, 0x00200000 + smem_size);
> +		if (!sfb->dp_regs) {
> +			dev_err(&pdev->dev,
> +				"%s: unable to map memory mapped IO!\n",
> +				sfb->fb->fix.id);
> +			err = -ENOMEM;
> +			goto failed_fb;
> +		}
> +
>  		sfb->lfb = sfb->dp_regs + 0x00200000;
>  		sfb->mmio = (smtc_regbaseaddress =
>  		    sfb->dp_regs + 0x000c0000);
>