[PATCH 1/2] remoteproc: elf_loader: skip segment with memsz as zero

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

From: Peng Fan <peng.fan@nxp.com>

Per elf specification,
p_filesz: This member gives the number of bytes in the file image of
the segment; it may be zero.
p_memsz: This member gives the number of bytes in the memory image
of the segment; it may be zero.

There is a case that i.MX DSP firmware has segment with PT_LOAD and
p_memsz/p_filesz set to zero. Such segment needs to be ignored,
otherwize rproc_da_to_va would report error.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20220413033038.1715945-2-peng.fan@oss.nxp.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
[ahmad: ported from Linux commit f340d5a19dc76c6b29eeb23537fd7345611e9117]
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 drivers/remoteproc/remoteproc_elf_loader.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c
index 740ce8765165..8f6f6d0bfa8d 100644
--- a/drivers/remoteproc/remoteproc_elf_loader.c
+++ b/drivers/remoteproc/remoteproc_elf_loader.c
@@ -40,7 +40,7 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
 		u32 offset = phdr->p_offset;
 		void *ptr;
 
-		if (phdr->p_type != PT_LOAD)
+		if (phdr->p_type != PT_LOAD || !memsz)
 			continue;
 
 		dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n",
-- 
2.39.5