Re: [PATCH v2 4/8] VMCI: dma dg: set OS page size

[Jorgen Hansen]

> On 4 Feb 2022, at 16.12, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> 
> On Thu, Feb 03, 2022 at 05:12:33AM -0800, Jorgen Hansen wrote:
>> Tell the device the page size used by the OS.
>> 
>> Reviewed-by: Vishnu Dasa <vdasa@xxxxxxxxxx>
>> Signed-off-by: Jorgen Hansen <jhansen@xxxxxxxxxx>
>> ---
>> drivers/misc/vmw_vmci/vmci_guest.c | 9 +++++++++
>> include/linux/vmw_vmci_defs.h      | 1 +
>> 2 files changed, 10 insertions(+)
>> 
>> diff --git a/drivers/misc/vmw_vmci/vmci_guest.c b/drivers/misc/vmw_vmci/vmci_guest.c
>> index 5a99d8e27873..808680dc0820 100644
>> --- a/drivers/misc/vmw_vmci/vmci_guest.c
>> +++ b/drivers/misc/vmw_vmci/vmci_guest.c
>> @@ -581,6 +581,15 @@ static int vmci_guest_probe_device(struct pci_dev *pdev,
>> 	/* Let the host know which capabilities we intend to use. */
>> 	vmci_write_reg(vmci_dev, caps_in_use, VMCI_CAPS_ADDR);
>> 
>> +	if (caps_in_use & VMCI_CAPS_DMA_DATAGRAM) {
>> +		uint32_t page_shift;
>> +
>> +		/* Let the device know the size for pages passed down. */
>> +		vmci_write_reg(vmci_dev, PAGE_SHIFT, VMCI_GUEST_PAGE_SHIFT);
>> +		page_shift = vmci_read_reg(vmci_dev, VMCI_GUEST_PAGE_SHIFT);
>> +		dev_info(&pdev->dev, "Using page shift %d\n", page_shift);
> 
> Please do not print out debugging stuff like this to the kernel log.

OK, I’ll remove it.

> When drivers are working properly, they are quiet.
> 
> thanks,
> 
> greg k-h

Thanks,
Jorgen