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fbdev/hecubafb: Use struct fb_info.screen_buffer

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Use info->screen_buffer when reading and writing framebuffers in
system memory. It's the correct pointer for this address space.

The struct fb_info has a union to store the framebuffer memory. This can
either be info->screen_base if the framebuffer is stored in I/O memory,
or info->screen_buffer if the framebuffer is stored in system memory.

As the driver operates on the latter address space, it is wrong to use
.screen_base and .screen_buffer must be used instead. This also gets
rid of casting needed due to not using the correct data type.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230428122452.4856-8-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2023-04-28 14:24:40 +02:00
parent ada45eda25
commit 3907e683c0
1 changed files with 4 additions and 4 deletions
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8
drivers/video/fbdev/hecubafb.c
View file

@ -102,7 +102,7 @@ static void apollo_send_command(struct hecubafb_par *par, unsigned char data)
static void hecubafb_dpy_update(struct hecubafb_par *par)
{
int i;
unsigned char *buf = (unsigned char __force *)par->info->screen_base;
unsigned char *buf = par->info->screen_buffer;
apollo_send_command(par, APOLLO_START_NEW_IMG);
@ -183,7 +183,7 @@ static ssize_t hecubafb_write(struct fb_info *info, const char __user *buf,
count = total_size - p;
}
dst = (void __force *) (info->screen_base + p);
dst = info->screen_buffer + p;
if (copy_from_user(dst, buf, count))
err = -EFAULT;
@ -239,7 +239,7 @@ static int hecubafb_probe(struct platform_device *dev)
if (!info)
goto err_fballoc;
info->screen_base = (char __force __iomem *)videomemory;
info->screen_buffer = videomemory;
info->fbops = &hecubafb_ops;
info->var = hecubafb_var;
@ -287,7 +287,7 @@ static int hecubafb_remove(struct platform_device *dev)
struct hecubafb_par *par = info->par;
fb_deferred_io_cleanup(info);
unregister_framebuffer(info);
vfree((void __force *)info->screen_base);
vfree(info->screen_buffer);
if (par->board->remove)
par->board->remove(par);
module_put(par->board->owner);