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mmc: card: fixing an false identification of SANITIZE command
Inside the routine mmc_blk_ioctl_cmd() the sanitize command is identified according to the value of bits 16-23 of the argument. but what happens if a different command is sent, and only by chance, bits 16-23 contain the value of SANITIZE command ? In that case a SANITIZE command will be falsely identified. In order to prevent such a case, the condition is expanded and now it also checks the opcode itself, and verifies that it is an MMC_SWITCH opcode. Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by: Chris Ball <cjb@laptop.org>
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1 changed files with 2 additions and 1 deletions
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@ -542,7 +542,8 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
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goto cmd_rel_host;
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}
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if (MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) {
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if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
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(cmd.opcode == MMC_SWITCH)) {
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err = ioctl_do_sanitize(card);
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if (err)
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