[PATCH] vgaarb: Downgrade userspace-triggerable messages to debug

[PATCH] vgaarb: Downgrade userspace-triggerable messages to debug

[Bjorn Helgaas]

To avoid userspace-triggerable dmesg spam, downgrade messages in the sysfs
write parsing code to debug level.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/gpu/vga/vgaarb.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c
index 3a8e9c6..f1312a9 100644
--- a/drivers/gpu/vga/vgaarb.c
+++ b/drivers/gpu/vga/vgaarb.c
@@ -1196,9 +1196,9 @@ static ssize_t vga_arb_write(struct file *file, const char __user *buf,
 			}
 			pdev = pci_get_domain_bus_and_slot(domain, bus, devfn);
 			if (!pdev) {
-				pr_err("invalid PCI address %04x:%02x:%02x.%x\n",
-					domain, bus, PCI_SLOT(devfn),
-					PCI_FUNC(devfn));
+				pr_debug("invalid PCI address %04x:%02x:%02x.%x\n",
+					 domain, bus, PCI_SLOT(devfn),
+					 PCI_FUNC(devfn));
 				ret_val = -ENODEV;
 				goto done;
 			}
@@ -1212,7 +1212,7 @@ static ssize_t vga_arb_write(struct file *file, const char __user *buf,
 		pr_debug("vgadev %p\n", vgadev);
 		if (vgadev == NULL) {
 			if (pdev) {
-				vgaarb_err(&pdev->dev, "not a VGA device\n");
+				vgaarb_dbg(&pdev->dev, "not a VGA device\n");
 				pci_dev_put(pdev);
 			}
 
@@ -1232,7 +1232,7 @@ static ssize_t vga_arb_write(struct file *file, const char __user *buf,
 			}
 		}
 		if (i == MAX_USER_CARDS) {
-			vgaarb_err(&pdev->dev, "maximum user cards (%d) number reached, ignoring this one!\n",
+			vgaarb_dbg(&pdev->dev, "maximum user cards (%d) number reached, ignoring this one!\n",
 				MAX_USER_CARDS);
 			pci_dev_put(pdev);
 			/* XXX: which value to return? */

Re: [PATCH] vgaarb: Downgrade userspace-triggerable messages to debug

[Daniel Vetter]

On Fri, Nov 18, 2016 at 08:11:58AM -0600, Bjorn Helgaas wrote:
> To avoid userspace-triggerable dmesg spam, downgrade messages in the sysfs
> write parsing code to debug level.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

Applied to drm-misc, thanks.
-Daniel

> ---
>  drivers/gpu/vga/vgaarb.c |   10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c
> index 3a8e9c6..f1312a9 100644
> --- a/drivers/gpu/vga/vgaarb.c
> +++ b/drivers/gpu/vga/vgaarb.c
> @@ -1196,9 +1196,9 @@ static ssize_t vga_arb_write(struct file *file, const char __user *buf,
>  			}
>  			pdev = pci_get_domain_bus_and_slot(domain, bus, devfn);
>  			if (!pdev) {
> -				pr_err("invalid PCI address %04x:%02x:%02x.%x\n",
> -					domain, bus, PCI_SLOT(devfn),
> -					PCI_FUNC(devfn));
> +				pr_debug("invalid PCI address %04x:%02x:%02x.%x\n",
> +					 domain, bus, PCI_SLOT(devfn),
> +					 PCI_FUNC(devfn));
>  				ret_val = -ENODEV;
>  				goto done;
>  			}
> @@ -1212,7 +1212,7 @@ static ssize_t vga_arb_write(struct file *file, const char __user *buf,
>  		pr_debug("vgadev %p\n", vgadev);
>  		if (vgadev == NULL) {
>  			if (pdev) {
> -				vgaarb_err(&pdev->dev, "not a VGA device\n");
> +				vgaarb_dbg(&pdev->dev, "not a VGA device\n");
>  				pci_dev_put(pdev);
>  			}
>  
> @@ -1232,7 +1232,7 @@ static ssize_t vga_arb_write(struct file *file, const char __user *buf,
>  			}
>  		}
>  		if (i == MAX_USER_CARDS) {
> -			vgaarb_err(&pdev->dev, "maximum user cards (%d) number reached, ignoring this one!\n",
> +			vgaarb_dbg(&pdev->dev, "maximum user cards (%d) number reached, ignoring this one!\n",
>  				MAX_USER_CARDS);
>  			pci_dev_put(pdev);
>  			/* XXX: which value to return? */
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch