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mmc: add boundary check for mmc operation

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Signed-off-by: Lei Wen <leiwen@marvell.com>
This commit is contained in:
Lei Wen 2010-09-13 22:07:27 +08:00 committed by Wolfgang Denk
parent a12555c02d
commit d2bf29e399
1 changed files with 10 additions and 0 deletions
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10
drivers/mmc/mmc.c
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@ -92,6 +92,11 @@ mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
blklen = mmc->write_bl_len; blklen = mmc->write_bl_len;
if ((start + blkcnt) > mmc->block_dev.lba) {
printf("MMC: block number 0x%x exceeds max(0x%x)",
start + blkcnt, mmc->block_dev.lba);
return 0;
}
err = mmc_set_blocklen(mmc, mmc->write_bl_len); err = mmc_set_blocklen(mmc, mmc->write_bl_len);
if (err) { if (err) {
@ -219,6 +224,11 @@ static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
if (!mmc) if (!mmc)
return 0; return 0;
if ((start + blkcnt) > mmc->block_dev.lba) {
printf("MMC: block number 0x%x exceeds max(0x%x)",
start + blkcnt, mmc->block_dev.lba);
return 0;
}
/* We always do full block reads from the card */ /* We always do full block reads from the card */
err = mmc_set_blocklen(mmc, mmc->read_bl_len); err = mmc_set_blocklen(mmc, mmc->read_bl_len);