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.
And I wasn't able to find in your code, where you are skipping the check against sect_done,
In case MODE_OPERATION_CODES field is not supported.

Thanks,
Avri

> >
> > 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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