remoteproc/mediatek: skip if filesz is 0

The main purpose of the loop is to load the memory to the SCP SRAM.
If filesz is 0, can go to next program header directly.

We don't need to try to validate the FW binary for those filesz==0
segments.

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20201116084413.3312631-3-tzungbi@google.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 0abbeb62cf43d539ee12fbda70ddb9e2110929cd..74ed675f61a6bc867dea43a1514db4e9580c600f 100644 (file)
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -234,12 +234,14 @@ static int scp_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
                u32 offset = phdr->p_offset;
                void __iomem *ptr;
 
-               if (phdr->p_type != PT_LOAD)
-                       continue;
-
                dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n",
                        phdr->p_type, da, memsz, filesz);
 
+               if (phdr->p_type != PT_LOAD)
+                       continue;
+               if (!filesz)
+                       continue;
+
                if (filesz > memsz) {
                        dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n",
                                filesz, memsz);
@@ -263,9 +265,7 @@ static int scp_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
                }
 
                /* put the segment where the remote processor expects it */
-               if (phdr->p_filesz)
-                       scp_memcpy_aligned(ptr, elf_data + phdr->p_offset,
-                                          filesz);
+               scp_memcpy_aligned(ptr, elf_data + phdr->p_offset, filesz);
        }
 
        return ret;