mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-30 10:39:04 +00:00
112 lines
3.2 KiB
Diff
112 lines
3.2 KiB
Diff
From 966ff2b4c758eb8c8c04f26422cd183e6aa8eda5 Mon Sep 17 00:00:00 2001
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
Date: Wed, 23 Jan 2019 18:25:50 +0000
|
|
Subject: [PATCH 316/806] char: vc_mem: Fix up compat ioctls for 64bit kernel
|
|
|
|
compat_ioctl wasn't defined, so 32bit user/64bit kernel
|
|
always failed.
|
|
VC_MEM_IOC_MEM_PHYS_ADDR was defined with parameter size
|
|
unsigned long, so the ioctl cmd changes between sizes.
|
|
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
---
|
|
drivers/char/broadcom/vc_mem.c | 40 +++++++++++++++++++++++++++++----
|
|
include/linux/broadcom/vc_mem.h | 4 ++++
|
|
2 files changed, 40 insertions(+), 4 deletions(-)
|
|
|
|
--- a/drivers/char/broadcom/vc_mem.c
|
|
+++ b/drivers/char/broadcom/vc_mem.c
|
|
@@ -148,7 +148,7 @@ vc_mem_ioctl(struct file *file, unsigned
|
|
(void) cmd;
|
|
(void) arg;
|
|
|
|
- pr_debug("%s: called file = 0x%p\n", __func__, file);
|
|
+ pr_debug("%s: called file = 0x%p, cmd %08x\n", __func__, file, cmd);
|
|
|
|
switch (cmd) {
|
|
case VC_MEM_IOC_MEM_PHYS_ADDR:
|
|
@@ -167,7 +167,7 @@ vc_mem_ioctl(struct file *file, unsigned
|
|
// Get the videocore memory size first
|
|
vc_mem_get_size();
|
|
|
|
- pr_debug("%s: VC_MEM_IOC_MEM_SIZE=%u\n", __func__,
|
|
+ pr_debug("%s: VC_MEM_IOC_MEM_SIZE=%x\n", __func__,
|
|
mm_vc_mem_size);
|
|
|
|
if (copy_to_user((void *) arg, &mm_vc_mem_size,
|
|
@@ -181,7 +181,7 @@ vc_mem_ioctl(struct file *file, unsigned
|
|
// Get the videocore memory base
|
|
vc_mem_get_base();
|
|
|
|
- pr_debug("%s: VC_MEM_IOC_MEM_BASE=%u\n", __func__,
|
|
+ pr_debug("%s: VC_MEM_IOC_MEM_BASE=%x\n", __func__,
|
|
mm_vc_mem_base);
|
|
|
|
if (copy_to_user((void *) arg, &mm_vc_mem_base,
|
|
@@ -195,7 +195,7 @@ vc_mem_ioctl(struct file *file, unsigned
|
|
// Get the videocore memory base
|
|
vc_mem_get_base();
|
|
|
|
- pr_debug("%s: VC_MEM_IOC_MEM_LOAD=%u\n", __func__,
|
|
+ pr_debug("%s: VC_MEM_IOC_MEM_LOAD=%x\n", __func__,
|
|
mm_vc_mem_base);
|
|
|
|
if (copy_to_user((void *) arg, &mm_vc_mem_base,
|
|
@@ -214,6 +214,35 @@ vc_mem_ioctl(struct file *file, unsigned
|
|
return rc;
|
|
}
|
|
|
|
+#ifdef CONFIG_COMPAT
|
|
+static long
|
|
+vc_mem_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
+{
|
|
+ int rc = 0;
|
|
+
|
|
+ switch (cmd) {
|
|
+ case VC_MEM_IOC_MEM_PHYS_ADDR32:
|
|
+ pr_debug("%s: VC_MEM_IOC_MEM_PHYS_ADDR32=0x%p\n",
|
|
+ __func__, (void *)mm_vc_mem_phys_addr);
|
|
+
|
|
+ /* This isn't correct, but will cover us for now as
|
|
+ * VideoCore is 32bit only.
|
|
+ */
|
|
+ if (copy_to_user((void *)arg, &mm_vc_mem_phys_addr,
|
|
+ sizeof(compat_ulong_t)))
|
|
+ rc = -EFAULT;
|
|
+
|
|
+ break;
|
|
+
|
|
+ default:
|
|
+ rc = vc_mem_ioctl(file, cmd, arg);
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ return rc;
|
|
+}
|
|
+#endif
|
|
+
|
|
/****************************************************************************
|
|
*
|
|
* vc_mem_mmap
|
|
@@ -259,6 +288,9 @@ static const struct file_operations vc_m
|
|
.open = vc_mem_open,
|
|
.release = vc_mem_release,
|
|
.unlocked_ioctl = vc_mem_ioctl,
|
|
+#ifdef CONFIG_COMPAT
|
|
+ .compat_ioctl = vc_mem_compat_ioctl,
|
|
+#endif
|
|
.mmap = vc_mem_mmap,
|
|
};
|
|
|
|
--- a/include/linux/broadcom/vc_mem.h
|
|
+++ b/include/linux/broadcom/vc_mem.h
|
|
@@ -32,4 +32,8 @@ extern unsigned int mm_vc_mem_size;
|
|
extern int vc_mem_get_current_size( void );
|
|
#endif
|
|
|
|
+#ifdef CONFIG_COMPAT
|
|
+#define VC_MEM_IOC_MEM_PHYS_ADDR32 _IOR(VC_MEM_IOC_MAGIC, 0, compat_ulong_t)
|
|
+#endif
|
|
+
|
|
#endif /* _VC_MEM_H */
|