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dev_mem: Fix config judgment 

Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
This commit is contained in:
wangjianyu3 2024-07-24 20:39:45 +08:00 committed by Xiang Xiao
parent 3c0befbdbd
commit 6013591cb1
1 changed files with 29 additions and 26 deletions
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55
drivers/misc/dev_mem.c
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@ -218,38 +218,41 @@ int devmem_register(void)
return -ENOMEM;
}
#ifdef CONFIG_BOARD_MEMORY_RANGE
len = parse_memory_region(CONFIG_BOARD_MEMORY_RANGE, region,
DEVMEM_REGION - 1);
if (len < 0)
if (CONFIG_BOARD_MEMORY_RANGE[0] != '\0')
{
kmm_free(region);
return len;
}
#else
if (len + (4 - merge) > DEVMEM_REGION)
{
len = DEVMEM_REGION - (4 - merge);
}
region[len].flags = PROT_EXEC | PROT_READ;
region[len].start = (uintptr_t)_stext;
region[len++].end = (uintptr_t)_etext;
region[len].flags = PROT_WRITE | PROT_READ;
region[len].start = (uintptr_t)_sdata;
region[len++].end = (uintptr_t)_edata;
if (merge)
{
region[len - 1].end = (uintptr_t)_ebss;
len = parse_memory_region(CONFIG_BOARD_MEMORY_RANGE, region,
DEVMEM_REGION - 1);
if (len < 0)
{
kmm_free(region);
return len;
}
}
else
{
if (len + (4 - merge) > DEVMEM_REGION)
{
len = DEVMEM_REGION - (4 - merge);
}
region[len].flags = PROT_EXEC | PROT_READ;
region[len].start = (uintptr_t)_stext;
region[len++].end = (uintptr_t)_etext;
region[len].flags = PROT_WRITE | PROT_READ;
region[len].start = (uintptr_t)_sbss;
region[len++].end = (uintptr_t)_ebss;
region[len].start = (uintptr_t)_sdata;
region[len++].end = (uintptr_t)_edata;
if (merge)
{
region[len - 1].end = (uintptr_t)_ebss;
}
else
{
region[len].flags = PROT_WRITE | PROT_READ;
region[len].start = (uintptr_t)_sbss;
region[len++].end = (uintptr_t)_ebss;
}
}
#endif
/* register the new MEM driver */