staging: unisys: decouple visor_memregion_{read, write}() (213e6a61) · Commits · 戴 / test

drivers/staging/unisys/visorutil/memregion_direct.c

+9 −17

Original line number	Diff line number	Diff line
		@@ -124,35 +124,27 @@ visor_memregion_resize(struct memregion *memregion, ulong newsize)
		}
		EXPORT_SYMBOL_GPL(visor_memregion_resize);

		static int
		memregion_readwrite(BOOL is_write,
		struct memregion *memregion, ulong offset,
		void *local, ulong nbytes)
		int
		visor_memregion_read(struct memregion memregion, ulong offset, void dest,
		ulong nbytes)
		{
		if (offset + nbytes > memregion->nbytes)
		return -EIO;

		if (is_write)
		memcpy_toio(memregion->mapped + offset, local, nbytes);
		else
		memcpy_fromio(local, memregion->mapped + offset, nbytes);

		memcpy_fromio(dest, memregion->mapped + offset, nbytes);
		return 0;
		}

		int
		visor_memregion_read(struct memregion memregion, ulong offset, void dest,
		ulong nbytes)
		{
		return memregion_readwrite(FALSE, memregion, offset, dest, nbytes);
		}
		EXPORT_SYMBOL_GPL(visor_memregion_read);

		int
		visor_memregion_write(struct memregion memregion, ulong offset, void src,
		ulong nbytes)
		{
		return memregion_readwrite(TRUE, memregion, offset, src, nbytes);
		if (offset + nbytes > memregion->nbytes)
		return -EIO;

		memcpy_toio(memregion->mapped + offset, src, nbytes);
		return 0;
		}
		EXPORT_SYMBOL_GPL(visor_memregion_write);