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[fix][dfs] elmfat磁盘操作设备指针判空
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This commit is contained in:
angryproton
Rbb666
@@ -908,6 +908,9 @@ DRESULT disk_read(BYTE drv, BYTE *buff, DWORD sector, UINT count)
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rt_size_t result;
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rt_device_t device = disk[drv];
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if (device == RT_NULL)
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return RES_ERROR;
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result = rt_device_read(device, sector, buff, count);
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if (result == count)
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{
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@@ -923,6 +926,9 @@ DRESULT disk_write(BYTE drv, const BYTE *buff, DWORD sector, UINT count)
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rt_size_t result;
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rt_device_t device = disk[drv];
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if (device == RT_NULL)
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return RES_ERROR;
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result = rt_device_write(device, sector, buff, count);
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if (result == count)
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{
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@@ -1146,6 +1146,9 @@ DRESULT disk_read(BYTE drv, BYTE *buff, DWORD sector, UINT count)
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rt_size_t result;
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rt_device_t device = disk[drv];
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if (device == RT_NULL)
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return RES_ERROR;
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result = rt_device_read(device, sector, buff, count);
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if (result == count)
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{
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@@ -1161,6 +1164,9 @@ DRESULT disk_write(BYTE drv, const BYTE *buff, DWORD sector, UINT count)
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rt_size_t result;
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rt_device_t device = disk[drv];
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if (device == RT_NULL)
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return RES_ERROR;
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result = rt_device_write(device, sector, buff, count);
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if (result == count)
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{
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