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rk29: vpu_mem: fix bug on invalid cache operation

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陈恒明
2011-05-24 10:16:23 +08:00
parent 566ff924d0
commit 9afe207ea4
1 changed files with 8 additions and 2 deletions
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10
arch/arm/mach-rk29/vpu_mem.c
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@@ -813,8 +813,12 @@ void vpu_mem_cache_opt(struct file *file, long index, unsigned int cmd)
return;
down_read(&vdm_rwsem);
{
do {
vdm_link *link = find_used_link(session, index);
if (NULL == link) {
pr_err("vpu_mem_cache_opt on non-exsist index %ld\n", index);
break;
}
start = vpu_mem.vbase + index * VPU_MEM_MIN_ALLOC;
end = start + link->pfn * VPU_MEM_MIN_ALLOC;;
switch (cmd) {
@@ -833,7 +837,7 @@ void vpu_mem_cache_opt(struct file *file, long index, unsigned int cmd)
default :
break;
}
}
} while (0);
up_read(&vdm_rwsem);
}
@@ -1023,6 +1027,8 @@ static long vpu_mem_ioctl(struct file *file, unsigned int cmd, unsigned long arg
{
if (copy_from_user(&index, (void __user *)arg, sizeof(index)))
return -EFAULT;
if (index < 0)
return -EINVAL;
vpu_mem_cache_opt(file, index, cmd);
break;
}