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Message-ID: <7f86f442-814c-be94-d387-5448f8260ca6@samsung.com>
Date: Fri, 17 Apr 2020 16:08:20 +0200
From: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To: Chuhong Yuan <hslester96@...il.com>
Cc: dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] video: fbdev: arcfb: add missed free_irq and fix the
order of request_irq
On 3/24/20 2:23 PM, Chuhong Yuan wrote:
> The driver forgets to free irq in remove which is requested in
> probe.
> Add the missed call to fix it.
> Also, the position of request_irq() in probe should be put before
> register_framebuffer().
>
> Signed-off-by: Chuhong Yuan <hslester96@...il.com>
Patch queued for v5.8, thanks.
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
> ---
> Changes in v4:
> - Use info->par->irq instead of par->irq to avoid dereferencing NULL pointer.
>
> drivers/video/fbdev/arcfb.c | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/video/fbdev/arcfb.c b/drivers/video/fbdev/arcfb.c
> index 314ab82e01c0..6f7838979f0a 100644
> --- a/drivers/video/fbdev/arcfb.c
> +++ b/drivers/video/fbdev/arcfb.c
> @@ -544,10 +544,6 @@ static int arcfb_probe(struct platform_device *dev)
> par->cslut[1] = 0x06;
> info->flags = FBINFO_FLAG_DEFAULT;
> spin_lock_init(&par->lock);
> - retval = register_framebuffer(info);
> - if (retval < 0)
> - goto err1;
> - platform_set_drvdata(dev, info);
> if (irq) {
> par->irq = irq;
> if (request_irq(par->irq, &arcfb_interrupt, IRQF_SHARED,
> @@ -558,6 +554,10 @@ static int arcfb_probe(struct platform_device *dev)
> goto err1;
> }
> }
> + retval = register_framebuffer(info);
> + if (retval < 0)
> + goto err1;
> + platform_set_drvdata(dev, info);
> fb_info(info, "Arc frame buffer device, using %dK of video memory\n",
> videomemorysize >> 10);
>
> @@ -593,6 +593,8 @@ static int arcfb_remove(struct platform_device *dev)
>
> if (info) {
> unregister_framebuffer(info);
> + if (irq)
> + free_irq(((struct arcfb_par *)(info->par))->irq, info);
> vfree((void __force *)info->screen_base);
> framebuffer_release(info);
> }
>
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