From 396a34340cdf7373c00e3977db27d1a20ea65ebc Mon Sep 17 00:00:00 2001
From: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Date: Fri, 25 Jul 2014 12:47:42 -0500
Subject: [PATCH] powerpc: Fix endianness of flash_block_list in rtas_flash
The function rtas_flash_firmware passes the address of a data structure,
flash_block_list, when making the update-flash-64-and-reboot rtas call.
While the endianness of the address is handled correctly, the endianness
of the data is not. This patch ensures that the data in flash_block_list
is big endian when passed to rtas on little endian hosts.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
arch/powerpc/kernel/rtas_flash.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c
index 658e89d2025b0..db2b482af6585 100644
--- a/arch/powerpc/kernel/rtas_flash.c
+++ b/arch/powerpc/kernel/rtas_flash.c
@@ -611,17 +611,19 @@ static void rtas_flash_firmware(int reboot_type)
for (f = flist; f; f = next) {
/* Translate data addrs to absolute */
for (i = 0; i < f->num_blocks; i++) {
- f->blocks[i].data = (char *)__pa(f->blocks[i].data);
+ f->blocks[i].data = (char *)cpu_to_be64(__pa(f->blocks[i].data));
image_size += f->blocks[i].length;
+ f->blocks[i].length = cpu_to_be64(f->blocks[i].length);
}
next = f->next;
/* Don't translate NULL pointer for last entry */
if (f->next)
- f->next = (struct flash_block_list *)__pa(f->next);
+ f->next = (struct flash_block_list *)cpu_to_be64(__pa(f->next));
else
f->next = NULL;
/* make num_blocks into the version/length field */
f->num_blocks = (FLASH_BLOCK_LIST_VERSION << 56) | ((f->num_blocks+1)*16);
+ f->num_blocks = cpu_to_be64(f->num_blocks);
}
printk(KERN_ALERT "FLASH: flash image is %ld bytes\n", image_size);
--
2.30.2