diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0274-char-vc_mem-Fix-up-compat-ioctls-for-64bit-kernel.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0274-char-vc_mem-Fix-up-compat-ioctls-for-64bit-kernel.patch | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0274-char-vc_mem-Fix-up-compat-ioctls-for-64bit-kernel.patch b/target/linux/brcm2708/patches-4.19/950-0274-char-vc_mem-Fix-up-compat-ioctls-for-64bit-kernel.patch new file mode 100644 index 0000000000..b0beb6d5c8 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0274-char-vc_mem-Fix-up-compat-ioctls-for-64bit-kernel.patch @@ -0,0 +1,111 @@ +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] 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 */ |