[PATCH 45/46] fbdev/viafb: Initialize fb_ops to fbdev I/O-memory helpers

[Thomas Zimmermann]

Initialize the instance of struct fb_ops with fbdev initializer
macros for framebuffers in I/O address space. Set the read/write,
draw and mmap callbacks to the correct implementation and avoid
implicit defaults. Also select the necessary I/O helpers in Kconfig.

Fbdev drivers sometimes rely on the callbacks being NULL for a
default implementation to be invoked; hence requiring the I/O
helpers to be built in any case. Setting all callbacks in all
drivers explicitly will allow to make the I/O helpers optional.
This benefits systems that do not use these functions.

No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Florian Tobias Schandinat <FlorianSchandinat at gmx.de>
---
 drivers/video/fbdev/Kconfig        | 1 +
 drivers/video/fbdev/via/viafbdev.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 021214ecd5e80..dab0e49a66d20 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -1240,6 +1240,7 @@ config FB_VIA
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT
+	select FB_IOMEM_FOPS
 	select I2C_ALGOBIT
 	select VIDEO_NOMODESET
 	help
diff --git a/drivers/video/fbdev/via/viafbdev.c b/drivers/video/fbdev/via/viafbdev.c
index 190fddee62e67..58868f8880d65 100644
--- a/drivers/video/fbdev/via/viafbdev.c
+++ b/drivers/video/fbdev/via/viafbdev.c
@@ -2054,6 +2054,7 @@ static struct fb_ops viafb_ops = {
 	.owner = THIS_MODULE,
 	.fb_open = viafb_open,
 	.fb_release = viafb_release,
+	__FB_DEFAULT_IOMEM_OPS_RDWR,
 	.fb_check_var = viafb_check_var,
 	.fb_set_par = viafb_set_par,
 	.fb_setcolreg = viafb_setcolreg,
@@ -2065,6 +2066,7 @@ static struct fb_ops viafb_ops = {
 	.fb_cursor = viafb_cursor,
 	.fb_ioctl = viafb_ioctl,
 	.fb_sync = viafb_sync,
+	__FB_DEFAULT_IOMEM_OPS_MMAP,
 };
 
 
-- 
2.42.0