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| author | Wolfgang Muees <wolfgang.mues@auerswald.de> | 2010-03-05 13:43:38 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-06 11:26:37 -0800 |
| commit | 0b3520f2df8e4e5dad6a7b2743d037bf06c22024 (patch) | |
| tree | c3cb1b36e5a4e05f94be6ac9c92da4bdcf4b5734 | |
| parent | dc2ed552804f3a2ae41c0ffe4bc09879ec8f7396 (diff) | |
| download | talos-op-linux-0b3520f2df8e4e5dad6a7b2743d037bf06c22024.tar.gz talos-op-linux-0b3520f2df8e4e5dad6a7b2743d037bf06c22024.zip | |
mmc: at91_mci: fix pointer errors
Fixes two pointer errors, one which leads to memory overwrites if used
with large chunks of data.
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Andrew Victor <avictor.za@gmail.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/mmc/host/at91_mci.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c index 63924e0c7ea9..4e1b2e6288da 100644 --- a/drivers/mmc/host/at91_mci.c +++ b/drivers/mmc/host/at91_mci.c @@ -227,11 +227,13 @@ static inline void at91_mci_sg_to_dma(struct at91mci_host *host, struct mmc_data for (index = 0; index < (amount / 4); index++) *dmabuf++ = swab32(sgbuffer[index]); } else { - memcpy(dmabuf, sgbuffer, amount); - dmabuf += amount; + char *tmpv = (char *)dmabuf; + memcpy(tmpv, sgbuffer, amount); + tmpv += amount; + dmabuf = (unsigned *)tmpv; } - kunmap_atomic(sgbuffer, KM_BIO_SRC_IRQ); + kunmap_atomic(((void *)sgbuffer) - sg->offset, KM_BIO_SRC_IRQ); if (size == 0) break; |
