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| author | Pierre Ossman <drzeus@drzeus.cx> | 2008-07-21 00:45:15 +0200 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2008-07-23 14:42:09 +0200 |
| commit | 6cefd05f35177ad5d22d44519c680cf43f2ac86d (patch) | |
| tree | 12d55e921315e34f7f60ffd17a01223a6966bdfd /drivers/mmc | |
| parent | mmc_test: test oversized sg lists (diff) | |
| download | linux-6cefd05f35177ad5d22d44519c680cf43f2ac86d.tar.xz linux-6cefd05f35177ad5d22d44519c680cf43f2ac86d.zip | |
sdhci: add warnings for bad buffers in ADMA path
The ADMA code path assumes that the 3 byte alignment fix doesn't cross
a page boundary. I'm not convinced this is worth supporting, but at
least print a warning in the off chance we'll actually see such a request.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 17701c3da733..b27c1a28a7ca 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -389,6 +389,7 @@ static int sdhci_adma_table_pre(struct sdhci_host *host, if (offset) { if (data->flags & MMC_DATA_WRITE) { buffer = sdhci_kmap_atomic(sg, &flags); + WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3)); memcpy(align, buffer, offset); sdhci_kunmap_atomic(buffer, &flags); } @@ -510,6 +511,7 @@ static void sdhci_adma_table_post(struct sdhci_host *host, size = 4 - (sg_dma_address(sg) & 0x3); buffer = sdhci_kmap_atomic(sg, &flags); + WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3)); memcpy(buffer, align, size); sdhci_kunmap_atomic(buffer, &flags); |