media: atomisp: get rid of atomisp_get_frame_pgnr() abstraction

Simplify the code by getting rid of this function, as it ends
being just a single line of code.

Link: https://lore.kernel.org/linux-media/80ea920d14379124ba92aab2e6a6d12a92d79b2b.1636544620.git.mchehab+huawei@kernel.orgSigned-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/pci/atomisp_cmd.c

@@ -1931,22 +1931,6 @@ irqreturn_t atomisp_isr_thread(int irq, void *isp_ptr)
 	return IRQ_HANDLED;
 }
 
-/*
- * utils for buffer allocation/free
- */
-
-int atomisp_get_frame_pgnr(struct atomisp_device *isp,
-			   const struct ia_css_frame *frame, u32 *p_pgnr)
-{
-	if (!frame) {
-		dev_err(isp->dev, "%s: NULL frame pointer ERROR.\n", __func__);
-		return -EINVAL;
-	}
-
-	*p_pgnr = DIV_ROUND_UP(frame->data_bytes, PAGE_SIZE);
-	return 0;
-}
-
 /*
  * Get internal fmt according to V4L2 fmt
  */

drivers/staging/media/atomisp/pci/atomisp_cmd.h

@@ -74,8 +74,6 @@ irqreturn_t atomisp_isr_thread(int irq, void *isp_ptr);
 const struct atomisp_format_bridge *get_atomisp_format_bridge_from_mbus(
     u32 mbus_code);
 bool atomisp_is_mbuscode_raw(uint32_t code);
-int atomisp_get_frame_pgnr(struct atomisp_device *isp,
-			   const struct ia_css_frame *frame, u32 *p_pgnr);
 void atomisp_delayed_init_work(struct work_struct *work);
 
 /* Get internal fmt according to V4L2 fmt */

drivers/staging/media/atomisp/pci/atomisp_fops.c

@@ -1094,7 +1094,7 @@ static int frame_mmap(struct atomisp_device *isp,
 
 	host_virt = vma->vm_start;
 	isp_virt = frame->data;
-	atomisp_get_frame_pgnr(isp, frame, &pgnr);
+	pgnr = DIV_ROUND_UP(frame->data_bytes, PAGE_SIZE);
 
 	if (do_isp_mm_remap(isp, vma, isp_virt, host_virt, pgnr))
 		return -EAGAIN;