RE: [PATCH] mmc-utils: correct ffu in case of unsupported MODE_OPERATION_CODES

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> Move up the return in case MODE_OPERATION_CODES is not supported.
> According to the specification when MODE_OPERATION_CODES is not
> supported no checks should be done against NUM_OF_FW_SEC_PROG.
> 
> Signed-off-by: Bruno Matic <bruno.matic@xxxxxxxxx>
> ---
>  mmc_cmds.c | 82 ++++++++++++++++++++++++++++--------------------------
>  1 file changed, 42 insertions(+), 40 deletions(-)
> 
> diff --git a/mmc_cmds.c b/mmc_cmds.c
> index ef1d8c6..81fdc7e 100644
> --- a/mmc_cmds.c
> +++ b/mmc_cmds.c
> @@ -2897,6 +2897,13 @@ do_retry:
>                 goto out;
>         }
> 
> +       /* check mode operation for ffu install*/
> +       if (!ext_csd[EXT_CSD_FFU_FEATURES]) {
You haven't read the ext_csd yet....

Thanks,
Avri

> +               fprintf(stderr, "Please reboot to complete firmware installation on
> %s\n", device);
> +               ret = 0;
> +               goto out;
> +       }
> +
>         ret = read_extcsd(dev_fd, ext_csd);
>         if (ret) {
>                 fprintf(stderr, "Could not read EXT_CSD from %s\n", device); @@ -
> 2927,49 +2934,44 @@ do_retry:
>                 goto out;
>         }
> 
> -       /* check mode operation for ffu install*/
> -       if (!ext_csd[EXT_CSD_FFU_FEATURES]) {
> -               fprintf(stderr, "Please reboot to complete firmware installation on
> %s\n", device);
> -       } else {
> -               fprintf(stderr, "Installing firmware on %s...\n", device);
> -               /* Re-enter ffu mode and install the firmware */
> -               multi_cmd->num_of_cmds = 2;
> -
> -               /* set ext_csd to install mode */
> -               multi_cmd->cmds[1].opcode = MMC_SWITCH;
> -               multi_cmd->cmds[1].blksz = 0;
> -               multi_cmd->cmds[1].blocks = 0;
> -               multi_cmd->cmds[1].arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24)
> |
> -                               (EXT_CSD_MODE_OPERATION_CODES << 16) |
> -                               (EXT_CSD_FFU_INSTALL << 8) |
> -                               EXT_CSD_CMD_SET_NORMAL;
> -               multi_cmd->cmds[1].flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
> MMC_CMD_AC;
> -               multi_cmd->cmds[1].write_flag = 1;
> -
> -               /* send ioctl with multi-cmd */
> -               ret = ioctl(dev_fd, MMC_IOC_MULTI_CMD, multi_cmd);
> +       fprintf(stderr, "Installing firmware on %s...\n", device);
> +       /* Re-enter ffu mode and install the firmware */
> +       multi_cmd->num_of_cmds = 2;
> 
> -               if (ret) {
> -                       perror("Multi-cmd ioctl failed setting install mode");
> -                       /* In case multi-cmd ioctl failed before exiting from ffu mode */
> -                       ioctl(dev_fd, MMC_IOC_CMD, &multi_cmd->cmds[3]);
> -                       goto out;
> -               }
> +       /* set ext_csd to install mode */
> +       multi_cmd->cmds[1].opcode = MMC_SWITCH;
> +       multi_cmd->cmds[1].blksz = 0;
> +       multi_cmd->cmds[1].blocks = 0;
> +       multi_cmd->cmds[1].arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
> +                       (EXT_CSD_MODE_OPERATION_CODES << 16) |
> +                       (EXT_CSD_FFU_INSTALL << 8) |
> +                       EXT_CSD_CMD_SET_NORMAL;
> +       multi_cmd->cmds[1].flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
> MMC_CMD_AC;
> +       multi_cmd->cmds[1].write_flag = 1;
> 
> -               ret = read_extcsd(dev_fd, ext_csd);
> -               if (ret) {
> -                       fprintf(stderr, "Could not read EXT_CSD from %s\n", device);
> -                       goto out;
> -               }
> +       /* send ioctl with multi-cmd */
> +       ret = ioctl(dev_fd, MMC_IOC_MULTI_CMD, multi_cmd);
> 
> -               /* return status */
> -               ret = ext_csd[EXT_CSD_FFU_STATUS];
> -               if (ret) {
> -                       fprintf(stderr, "%s: error %d during FFU install:\n", device, ret);
> -                       goto out;
> -               } else {
> -                       fprintf(stderr, "FFU finished successfully\n");
> -               }
> +       if (ret) {
> +               perror("Multi-cmd ioctl failed setting install mode");
> +               /* In case multi-cmd ioctl failed before exiting from ffu mode */
> +               ioctl(dev_fd, MMC_IOC_CMD, &multi_cmd->cmds[3]);
> +               goto out;
> +       }
> +
> +       ret = read_extcsd(dev_fd, ext_csd);
> +       if (ret) {
> +               fprintf(stderr, "Could not read EXT_CSD from %s\n", device);
> +               goto out;
> +       }
> +
> +       /* return status */
> +       ret = ext_csd[EXT_CSD_FFU_STATUS];
> +       if (ret) {
> +               fprintf(stderr, "%s: error %d during FFU install:\n", device, ret);
> +               goto out;
> +       } else {
> +               fprintf(stderr, "FFU finished successfully\n");
>         }
> 
>  out:
> --
> 2.29.0





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