diff options
| author | Qipeng Zha <qipeng.zha@intel.com> | 2016-01-08 11:32:27 +0100 |
|---|---|---|
| committer | Darren Hart <dvhart@linux.intel.com> | 2016-01-20 02:35:49 +0100 |
| commit | 3fae75740faff4c6a66be7131838fda3ae92e280 (patch) | |
| tree | 742478b6dc378ee25a6ecad69b9f2d41bf6de271 /drivers/platform | |
| parent | thinkpad_acpi: Add support for keyboard backlight (diff) | |
| download | linux-3fae75740faff4c6a66be7131838fda3ae92e280.tar.xz linux-3fae75740faff4c6a66be7131838fda3ae92e280.zip | |
intel_punit_ipc: add NULL check for input parameters
intel_punit_ipc_command() maybe called when in or out
data pointers are NULL.
Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/intel_punit_ipc.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/platform/x86/intel_punit_ipc.c b/drivers/platform/x86/intel_punit_ipc.c index 16685bc96946..bd875409a02d 100644 --- a/drivers/platform/x86/intel_punit_ipc.c +++ b/drivers/platform/x86/intel_punit_ipc.c @@ -187,10 +187,12 @@ int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2, u32 *in, u32 *out) reinit_completion(&ipcdev->cmd_complete); type = (cmd & IPC_PUNIT_CMD_TYPE_MASK) >> IPC_TYPE_OFFSET; - ipc_write_data_low(ipcdev, type, *in); - if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC) - ipc_write_data_high(ipcdev, type, *++in); + if (in) { + ipc_write_data_low(ipcdev, type, *in); + if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC) + ipc_write_data_high(ipcdev, type, *++in); + } val = cmd & ~IPC_PUNIT_CMD_TYPE_MASK; val |= CMD_RUN | para2 << CMD_PARA2_SHIFT | para1 << CMD_PARA1_SHIFT; @@ -199,10 +201,12 @@ int intel_punit_ipc_command(u32 cmd, u32 para1, u32 para2, u32 *in, u32 *out) ret = intel_punit_ipc_check_status(ipcdev, type); if (ret) goto out; - *out = ipc_read_data_low(ipcdev, type); - if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC) - *++out = ipc_read_data_high(ipcdev, type); + if (out) { + *out = ipc_read_data_low(ipcdev, type); + if (type == GTDRIVER_IPC || type == ISPDRIVER_IPC) + *++out = ipc_read_data_high(ipcdev, type); + } out: mutex_unlock(&ipcdev->lock); |