media: atomisp: add NULL check for asd obtained from atomisp_video_pipe

This is almost a BUG report with RFC patch that just avoids kernel
oopses. Thus, prefixed with [BUG][RFC].

Here is the kernel log after running `v4l2-compliance -d /dev/video4`
with this patch applied:

	kern  :err   : [25507.580392] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.592343] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.592995] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.593685] atomisp-isp2 0000:00:03.0: atomisp_g_input(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.593719] atomisp-isp2 0000:00:03.0: atomisp_g_parm(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.593727] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	[omitting 42 same messages]
	kern  :err   : [25507.593976] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594191] atomisp-isp2 0000:00:03.0: atomisp_g_input(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594449] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	[omitting 43 same messages]
	kern  :err   : [25507.594756] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594779] atomisp-isp2 0000:00:03.0: atomisp_g_ctrl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594787] atomisp-isp2 0000:00:03.0: atomisp_s_ctrl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594803] atomisp-isp2 0000:00:03.0: atomisp_camera_g_ext_ctrls(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594880] atomisp-isp2 0000:00:03.0: atomisp_enum_fmt_cap(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.594915] atomisp-isp2 0000:00:03.0: atomisp_g_parm(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.595058] atomisp-isp2 0000:00:03.0: atomisp_try_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.595089] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.595124] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.595221] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.595241] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.601571] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.607496] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.608604] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.611988] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.617420] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.618429] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.618811] atomisp-isp2 0000:00:03.0: atomisp_g_parm(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.622193] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.627355] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.628391] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.631143] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.635813] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.636489] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.636504] atomisp-isp2 0000:00:03.0: atomisp_s_input(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.636516] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.639111] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.646152] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.646831] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.646847] atomisp-isp2 0000:00:03.0: atomisp_s_input(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.650079] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.657476] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.658741] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.658759] atomisp-isp2 0000:00:03.0: atomisp_s_input(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.658771] atomisp-isp2 0000:00:03.0: atomisp_set_fmt(): asd is NULL, device is ATOMISP ISP ACC
	kern  :err   : [25507.660959] atomisp-isp2 0000:00:03.0: can't change power state from D3cold to D0 (config space inaccessible)
	kern  :warn  : [25507.666665] isys dma store at addr(0xcd408) val(0)
	kern  :err   : [25507.667397] atomisp-isp2 0000:00:03.0: atomisp_queryctl(): asd is NULL, device is ATOMISP ISP ACC

[mchehab: fix coding style]
Signed-off-by: Tsuchiya Yuto <kitakar@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/staging/media/atomisp/pci/atomisp_cmd.c b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
index 366161c..75a5316 100644 (file)
--- a/drivers/staging/media/atomisp/pci/atomisp_cmd.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
@@ -1715,6 +1715,12 @@ void atomisp_wdt_refresh_pipe(struct atomisp_video_pipe *pipe,
 {
        unsigned long next;
 
+       if (!pipe->asd) {
+               dev_err(pipe->isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, pipe->vdev.name);
+               return;
+       }
+
        if (delay != ATOMISP_WDT_KEEP_CURRENT_DELAY)
                pipe->wdt_duration = delay;
 
@@ -1777,6 +1783,12 @@ void atomisp_wdt_refresh(struct atomisp_sub_device *asd, unsigned int delay)
 /* ISP2401 */
 void atomisp_wdt_stop_pipe(struct atomisp_video_pipe *pipe, bool sync)
 {
+       if (!pipe->asd) {
+               dev_err(pipe->isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, pipe->vdev.name);
+               return;
+       }
+
        if (!atomisp_is_wdt_running(pipe))
                return;
 
@@ -4109,6 +4121,12 @@ void atomisp_handle_parameter_and_buffer(struct atomisp_video_pipe *pipe)
        unsigned long irqflags;
        bool need_to_enqueue_buffer = false;
 
+       if (!asd) {
+               dev_err(pipe->isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, pipe->vdev.name);
+               return;
+       }
+
        if (atomisp_is_vf_pipe(pipe))
                return;
 
@@ -4196,6 +4214,12 @@ int atomisp_set_parameters(struct video_device *vdev,
        struct atomisp_css_params *css_param = &asd->params.css_param;
        int ret;
 
+       if (!asd) {
+               dev_err(pipe->isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        if (!asd->stream_env[ATOMISP_INPUT_STREAM_GENERAL].stream) {
                dev_err(asd->isp->dev, "%s: internal error!\n", __func__);
                return -EINVAL;
@@ -4857,6 +4881,12 @@ int atomisp_try_fmt(struct video_device *vdev, struct v4l2_pix_format *f,
        int source_pad = atomisp_subdev_source_pad(vdev);
        int ret;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        if (!isp->inputs[asd->input_curr].camera)
                return -EINVAL;
 
@@ -5198,6 +5228,12 @@ static int atomisp_set_fmt_to_isp(struct video_device *vdev,
        const struct atomisp_in_fmt_conv *fc;
        int ret, i;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        v4l2_fh_init(&fh.vfh, vdev);
 
        isp_sink_crop = atomisp_subdev_get_rect(
@@ -5494,6 +5530,7 @@ static int atomisp_set_fmt_to_snr(struct video_device *vdev,
                                  unsigned int dvs_env_w, unsigned int dvs_env_h)
 {
        struct atomisp_sub_device *asd = atomisp_to_video_pipe(vdev)->asd;
+       struct atomisp_video_pipe *pipe = atomisp_to_video_pipe(vdev);
        const struct atomisp_format_bridge *format;
        struct v4l2_subdev_pad_config pad_cfg;
        struct v4l2_subdev_state pad_state = {
@@ -5512,6 +5549,12 @@ static int atomisp_set_fmt_to_snr(struct video_device *vdev,
        struct v4l2_subdev_fh fh;
        int ret;
 
+       if (!asd) {
+               dev_err(pipe->isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        v4l2_fh_init(&fh.vfh, vdev);
 
        stream_index = atomisp_source_pad_to_stream_id(asd, source_pad);
@@ -5602,6 +5645,12 @@ int atomisp_set_fmt(struct video_device *vdev, struct v4l2_format *f)
        struct v4l2_subdev_fh fh;
        int ret;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        if (source_pad >= ATOMISP_SUBDEV_PADS_NUM)
                return -EINVAL;
 
@@ -6034,6 +6083,12 @@ int atomisp_set_fmt_file(struct video_device *vdev, struct v4l2_format *f)
        struct v4l2_subdev_fh fh;
        int ret;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        v4l2_fh_init(&fh.vfh, vdev);
 
        dev_dbg(isp->dev, "setting fmt %ux%u 0x%x for file inject\n",
@@ -6359,6 +6414,12 @@ bool atomisp_is_vf_pipe(struct atomisp_video_pipe *pipe)
 {
        struct atomisp_sub_device *asd = pipe->asd;
 
+       if (!asd) {
+               dev_err(pipe->isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, pipe->vdev.name);
+               return false;
+       }
+
        if (pipe == &asd->video_out_vf)
                return true;
 
@@ -6572,6 +6633,12 @@ static int atomisp_get_pipe_id(struct atomisp_video_pipe *pipe)
 {
        struct atomisp_sub_device *asd = pipe->asd;
 
+       if (!asd) {
+               dev_err(pipe->isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, pipe->vdev.name);
+               return -EINVAL;
+       }
+
        if (ATOMISP_USE_YUVPP(asd)) {
                return IA_CSS_PIPE_ID_YUVPP;
        } else if (asd->vfpp->val == ATOMISP_VFPP_DISABLE_SCALER) {
@@ -6609,6 +6676,12 @@ int atomisp_get_invalid_frame_num(struct video_device *vdev,
        struct ia_css_pipe_info p_info;
        int ret;
 
+       if (!asd) {
+               dev_err(pipe->isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        if (asd->isp->inputs[asd->input_curr].camera_caps->
            sensor[asd->sensor_curr].stream_num > 1) {
                /* External ISP */

diff --git a/drivers/staging/media/atomisp/pci/atomisp_fops.c b/drivers/staging/media/atomisp/pci/atomisp_fops.c
index 0732c9c..72cbdce 100644 (file)
--- a/drivers/staging/media/atomisp/pci/atomisp_fops.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_fops.c
@@ -1187,6 +1187,12 @@ static int atomisp_mmap(struct file *file, struct vm_area_struct *vma)
        u32 origin_size, new_size;
        int ret;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        if (!(vma->vm_flags & (VM_WRITE | VM_READ)))
                return -EACCES;
 

diff --git a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c
index c8a6256..a57e640 100644 (file)
--- a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c
@@ -646,6 +646,12 @@ static int atomisp_g_input(struct file *file, void *fh, unsigned int *input)
        struct atomisp_device *isp = video_get_drvdata(vdev);
        struct atomisp_sub_device *asd = atomisp_to_video_pipe(vdev)->asd;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        rt_mutex_lock(&isp->mutex);
        *input = asd->input_curr;
        rt_mutex_unlock(&isp->mutex);
@@ -665,6 +671,12 @@ static int atomisp_s_input(struct file *file, void *fh, unsigned int input)
        struct v4l2_subdev *motor;
        int ret;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        rt_mutex_lock(&isp->mutex);
        if (input >= ATOM_ISP_MAX_INPUTS || input >= isp->input_cnt) {
                dev_dbg(isp->dev, "input_cnt: %d\n", isp->input_cnt);
@@ -765,6 +777,12 @@ static int atomisp_enum_fmt_cap(struct file *file, void *fh,
        unsigned int i, fi = 0;
        int rval;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        rt_mutex_lock(&isp->mutex);
        rval = v4l2_subdev_call(isp->inputs[asd->input_curr].camera, pad,
                                enum_mbus_code, NULL, &code);
@@ -1027,6 +1045,12 @@ int __atomisp_reqbufs(struct file *file, void *fh,
        u16 stream_id = atomisp_source_pad_to_stream_id(asd, source_pad);
        int ret = 0, i = 0;
 
+       if (!asd) {
+               dev_err(pipe->isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        if (req->count == 0) {
                mutex_lock(&pipe->capq.vb_lock);
                if (!list_empty(&pipe->capq.stream))
@@ -1154,6 +1178,12 @@ static int atomisp_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
        u32 pgnr;
        int ret = 0;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        rt_mutex_lock(&isp->mutex);
        if (isp->isp_fatal_error) {
                ret = -EIO;
@@ -1389,6 +1419,12 @@ static int atomisp_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
        struct atomisp_device *isp = video_get_drvdata(vdev);
        int ret = 0;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        rt_mutex_lock(&isp->mutex);
 
        if (isp->isp_fatal_error) {
@@ -1640,6 +1676,12 @@ static int atomisp_streamon(struct file *file, void *fh,
        int ret = 0;
        unsigned long irqflags;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        dev_dbg(isp->dev, "Start stream on pad %d for asd%d\n",
                atomisp_subdev_source_pad(vdev), asd->index);
 
@@ -1901,6 +1943,12 @@ int __atomisp_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
        unsigned long flags;
        bool first_streamoff = false;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        dev_dbg(isp->dev, "Stop stream on pad %d for asd%d\n",
                atomisp_subdev_source_pad(vdev), asd->index);
 
@@ -2150,6 +2198,12 @@ static int atomisp_g_ctrl(struct file *file, void *fh,
        struct atomisp_device *isp = video_get_drvdata(vdev);
        int i, ret = -EINVAL;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        for (i = 0; i < ctrls_num; i++) {
                if (ci_v4l2_controls[i].id == control->id) {
                        ret = 0;
@@ -2229,6 +2283,12 @@ static int atomisp_s_ctrl(struct file *file, void *fh,
        struct atomisp_device *isp = video_get_drvdata(vdev);
        int i, ret = -EINVAL;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        for (i = 0; i < ctrls_num; i++) {
                if (ci_v4l2_controls[i].id == control->id) {
                        ret = 0;
@@ -2310,6 +2370,12 @@ static int atomisp_queryctl(struct file *file, void *fh,
        struct atomisp_sub_device *asd = atomisp_to_video_pipe(vdev)->asd;
        struct atomisp_device *isp = video_get_drvdata(vdev);
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        switch (qc->id) {
        case V4L2_CID_FOCUS_ABSOLUTE:
        case V4L2_CID_FOCUS_RELATIVE:
@@ -2355,6 +2421,12 @@ static int atomisp_camera_g_ext_ctrls(struct file *file, void *fh,
        int i;
        int ret = 0;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        if (!IS_ISP2401)
                motor = isp->inputs[asd->input_curr].motor;
        else
@@ -2466,6 +2538,12 @@ static int atomisp_camera_s_ext_ctrls(struct file *file, void *fh,
        int i;
        int ret = 0;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        if (!IS_ISP2401)
                motor = isp->inputs[asd->input_curr].motor;
        else
@@ -2591,6 +2669,12 @@ static int atomisp_g_parm(struct file *file, void *fh,
        struct atomisp_sub_device *asd = atomisp_to_video_pipe(vdev)->asd;
        struct atomisp_device *isp = video_get_drvdata(vdev);
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
                dev_err(isp->dev, "unsupported v4l2 buf type\n");
                return -EINVAL;
@@ -2613,6 +2697,12 @@ static int atomisp_s_parm(struct file *file, void *fh,
        int rval;
        int fps;
 
+       if (!asd) {
+               dev_err(isp->dev, "%s(): asd is NULL, device is %s\n",
+                       __func__, vdev->name);
+               return -EINVAL;
+       }
+
        if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
                dev_err(isp->dev, "unsupported v4l2 buf type\n");
                return -EINVAL;