[PATCH master] remoteproc: use I/O memory variants of memcpy/memset

[Ahmad Fatoum]

Reserved memory is unmapped strongly ordered in barebox and calling
normal optimized memcpy on may trigger an abort due to misalignment.

Fix this by using the slower I/O variants of memcpy/memset, which are
do not expect bufferable memory like the optimized variants and thus
don't cause unaligned accesses.

Fixes: 66e233b8c04b ("ARM: mmu64: map reserved regions uncached")
Reported-by: Stefano Manni <stefano.manni at gmail.com>
Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 drivers/remoteproc/remoteproc_core.c       | 2 +-
 drivers/remoteproc/remoteproc_elf_loader.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 7590c1f9305b..17159316ee31 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -75,7 +75,7 @@ static int rproc_firmware_write_buf(struct firmware_handler *fh, const void *buf
 		return -ENOMEM;
 	}
 
-	memcpy(rproc->fw_buf + rproc->fw_buf_ofs, buf, size);
+	memcpy_toio(rproc->fw_buf + rproc->fw_buf_ofs, buf, size);
 	rproc->fw_buf_ofs += size;
 
 	return 0;
diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c
index f3bf93df2c4a..740ce8765165 100644
--- a/drivers/remoteproc/remoteproc_elf_loader.c
+++ b/drivers/remoteproc/remoteproc_elf_loader.c
@@ -70,7 +70,7 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
 
 		/* put the segment where the remote processor expects it */
 		if (phdr->p_filesz)
-			memcpy(ptr, elf_data + phdr->p_offset, filesz);
+			memcpy_toio(ptr, elf_data + phdr->p_offset, filesz);
 
 		/*
 		 * Zero out remaining memory for this segment.
@@ -80,7 +80,7 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
 		 * this.
 		 */
 		if (memsz > filesz)
-			memset(ptr + filesz, 0, memsz - filesz);
+			memset_io(ptr + filesz, 0, memsz - filesz);
 	}
 
 	return ret;
-- 
2.39.5