Older tftp server don't send the file size.
Then tftpfs needs temporary place to store the file.
mount ramfs and then tftpfs in a own mount point

Signed-off-by: Jan Remmet <[email protected]>
Tested-by: Wadim Egorov <[email protected]>
---
 arch/arm/mach-omap/Kconfig |  1 +
 arch/arm/mach-omap/xload.c | 30 ++++++++++++++++++++++++++----
 2 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-omap/Kconfig b/arch/arm/mach-omap/Kconfig
index af35975..aeed79f 100644
--- a/arch/arm/mach-omap/Kconfig
+++ b/arch/arm/mach-omap/Kconfig
@@ -106,6 +106,7 @@ config AM33XX_NET_BOOT
        bool "enable AM335x network boot"
        select ENVIRONMENT_VARIABLES
        select NET_DHCP
+       select FS_RAMFS
        select FS_TFTP
        select DRIVER_NET_CPSW
        default n
diff --git a/arch/arm/mach-omap/xload.c b/arch/arm/mach-omap/xload.c
index 4a0714e..b0ce1d6 100644
--- a/arch/arm/mach-omap/xload.c
+++ b/arch/arm/mach-omap/xload.c
@@ -229,13 +229,16 @@ static void *omap_serial_boot(void){
        return buf;
 }
 
+#define TFTP_MOUNT "/.tftp"
+
 static void *am33xx_net_boot(void)
 {
        void *buf = NULL;
        int err;
        int len;
        struct dhcp_req_param dhcp_param;
-       const char *bootfile;
+       const char *bootfile, *ip;
+       char *file;
 
        am33xx_register_ethaddr(0, 0);
 
@@ -247,7 +250,22 @@ static void *am33xx_net_boot(void)
                return NULL;
        }
 
-       err = mount(ip_to_string(net_get_serverip()), "tftp", "/", NULL);
+       /*
+        * Older tftp server don't send the file size.
+        * Then tftpfs needs temporary place to store the file.
+        */
+       err = mount("none", "ramfs", "/", NULL);
+       if (err < 0) {
+               printf("failed to mount ramfs\n");
+               return NULL;
+       }
+
+       err = make_directory(TFTP_MOUNT);
+       if (err)
+               return NULL;
+
+       ip = ip_to_string(net_get_serverip());
+       err = mount(ip, "tftp", TFTP_MOUNT, NULL);
        if (err < 0) {
                printf("Unable to mount.\n");
                return NULL;
@@ -259,11 +277,15 @@ static void *am33xx_net_boot(void)
                return NULL;
        }
 
-       buf = read_file(bootfile, &len);
+       file = asprintf("%s/%s", TFTP_MOUNT, bootfile);
+
+       buf = read_file(file, &len);
        if (!buf)
                printf("could not read %s.\n", bootfile);
 
-       umount("/");
+       free(file);
+
+       umount(TFTP_MOUNT);
 
        return buf;
 }
-- 
1.9.1


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