diff options
| author | Sachin Kamat <sachin.kamat@linaro.org> | 2014-06-10 14:00:34 +0400 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2014-07-09 17:58:01 +0400 |
| commit | 44b61a9f23dabf27303d32b4947f017f69ca90f6 (patch) | |
| tree | c6de8469cebdbe9a57dca4f53bf238e9423e050b /drivers/mfd/asic3.c | |
| parent | 967580598f46997ce5eeeea812686f5220bb49de (diff) | |
| download | linux-44b61a9f23dabf27303d32b4947f017f69ca90f6.tar.xz | |
mfd: asic3: Fix potential null pointer dereference
We previously assumed 'mem_sdio' could be null but it is
dereferenced in ioremap(). Add a check to avoid a potential
null pointer dereference error.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd/asic3.c')
| -rw-r--r-- | drivers/mfd/asic3.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c index 9f6294f2a070..9fc4186d4132 100644 --- a/drivers/mfd/asic3.c +++ b/drivers/mfd/asic3.c @@ -899,13 +899,15 @@ static int __init asic3_mfd_probe(struct platform_device *pdev, ds1wm_resources[0].end >>= asic->bus_shift; /* MMC */ - asic->tmio_cnf = ioremap((ASIC3_SD_CONFIG_BASE >> asic->bus_shift) + + if (mem_sdio) { + asic->tmio_cnf = ioremap((ASIC3_SD_CONFIG_BASE >> asic->bus_shift) + mem_sdio->start, ASIC3_SD_CONFIG_SIZE >> asic->bus_shift); - if (!asic->tmio_cnf) { - ret = -ENOMEM; - dev_dbg(asic->dev, "Couldn't ioremap SD_CONFIG\n"); - goto out; + if (!asic->tmio_cnf) { + ret = -ENOMEM; + dev_dbg(asic->dev, "Couldn't ioremap SD_CONFIG\n"); + goto out; + } } asic3_mmc_resources[0].start >>= asic->bus_shift; asic3_mmc_resources[0].end >>= asic->bus_shift; |