Re: [PATCH v4 10/10] drm/vboxvideo: fix mapping leaks

[Hans de Goede]

Hi,

On 3/1/24 12:29, Philipp Stanner wrote:
> When the PCI devres API was introduced to this driver, it was wrongly
> assumed that initializing the device with pcim_enable_device() instead
> of pci_enable_device() will make all PCI functions managed.
> 
> This is wrong and was caused by the quite confusing PCI devres API in
> which some, but not all, functions become managed that way.
> 
> The function pci_iomap_range() is never managed.
> 
> Replace pci_iomap_range() with the actually managed function
> pcim_iomap_range().
> 
> CC: <stable@xxxxxxxxxxxxxxx> # v5.10+
> Fixes: 8558de401b5f ("drm/vboxvideo: use managed pci functions")
> Signed-off-by: Philipp Stanner <pstanner@xxxxxxxxxx>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>

Since this depends on the pcim_iomap_range() function which is new
in this series and since the vboxvideo code does not see a lot
of changes I think that it would be best for this patch to be
merged through the PCI tree together with the rest of the series.

Regards,

Hans


> ---
>  drivers/gpu/drm/vboxvideo/vbox_main.c | 20 +++++++++-----------
>  1 file changed, 9 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vboxvideo/vbox_main.c b/drivers/gpu/drm/vboxvideo/vbox_main.c
> index 42c2d8a99509..d4ade9325401 100644
> --- a/drivers/gpu/drm/vboxvideo/vbox_main.c
> +++ b/drivers/gpu/drm/vboxvideo/vbox_main.c
> @@ -42,12 +42,11 @@ static int vbox_accel_init(struct vbox_private *vbox)
>  	/* Take a command buffer for each screen from the end of usable VRAM. */
>  	vbox->available_vram_size -= vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE;
>  
> -	vbox->vbva_buffers = pci_iomap_range(pdev, 0,
> -					     vbox->available_vram_size,
> -					     vbox->num_crtcs *
> -					     VBVA_MIN_BUFFER_SIZE);
> -	if (!vbox->vbva_buffers)
> -		return -ENOMEM;
> +	vbox->vbva_buffers = pcim_iomap_range(
> +			pdev, 0, vbox->available_vram_size,
> +			vbox->num_crtcs * VBVA_MIN_BUFFER_SIZE);
> +	if (IS_ERR(vbox->vbva_buffers))
> +		return PTR_ERR(vbox->vbva_buffers);
>  
>  	for (i = 0; i < vbox->num_crtcs; ++i) {
>  		vbva_setup_buffer_context(&vbox->vbva_info[i],
> @@ -116,11 +115,10 @@ int vbox_hw_init(struct vbox_private *vbox)
>  	DRM_INFO("VRAM %08x\n", vbox->full_vram_size);
>  
>  	/* Map guest-heap at end of vram */
> -	vbox->guest_heap =
> -	    pci_iomap_range(pdev, 0, GUEST_HEAP_OFFSET(vbox),
> -			    GUEST_HEAP_SIZE);
> -	if (!vbox->guest_heap)
> -		return -ENOMEM;
> +	vbox->guest_heap = pcim_iomap_range(pdev, 0,
> +			GUEST_HEAP_OFFSET(vbox), GUEST_HEAP_SIZE);
> +	if (IS_ERR(vbox->guest_heap))
> +		return PTR_ERR(vbox->guest_heap);
>  
>  	/* Create guest-heap mem-pool use 2^4 = 16 byte chunks */
>  	vbox->guest_pool = devm_gen_pool_create(vbox->ddev.dev, 4, -1,