V4L/DVB: V4L2: Replace loops for finding max buffers in VIDIOC_REQBUFS callbacks
Due to obvious copy and paste coding a number of video capture drivers
which implement a limit on the buffer memory decremented the user
supplied buffer count in a while loop until it reaches an acceptable
value.
This is a silly thing to do when the maximum value can be directly
computed.
Signed-off-by: Andreas Bombe <aeb@debian.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
index f4860f0..350e7af 100644
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -1806,8 +1806,8 @@
*size = fh->fmt->depth*fh->width*fh->height >> 3;
if (0 == *count)
*count = gbuffers;
- while (*size * *count > gbuffers * gbufsize)
- (*count)--;
+ if (*size * *count > gbuffers * gbufsize)
+ *count = (gbuffers * gbufsize) / *size;
return 0;
}
diff --git a/drivers/media/video/cx23885/cx23885-video.c b/drivers/media/video/cx23885/cx23885-video.c
index 2d3ac8b..543b854 100644
--- a/drivers/media/video/cx23885/cx23885-video.c
+++ b/drivers/media/video/cx23885/cx23885-video.c
@@ -514,8 +514,8 @@
*size = fh->fmt->depth*fh->width*fh->height >> 3;
if (0 == *count)
*count = 32;
- while (*size * *count > vid_limit * 1024 * 1024)
- (*count)--;
+ if (*size * *count > vid_limit * 1024 * 1024)
+ *count = (vid_limit * 1024 * 1024) / *size;
return 0;
}
diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index 8e414f7..0a3849c 100644
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -561,8 +561,8 @@
*size = fh->fmt->depth*fh->width*fh->height >> 3;
if (0 == *count)
*count = 32;
- while (*size * *count > vid_limit * 1024 * 1024)
- (*count)--;
+ if (*size * *count > vid_limit * 1024 * 1024)
+ *count = (vid_limit * 1024 * 1024) / *size;
return 0;
}
diff --git a/drivers/media/video/mx1_camera.c b/drivers/media/video/mx1_camera.c
index 34a6601..5c17f9e 100644
--- a/drivers/media/video/mx1_camera.c
+++ b/drivers/media/video/mx1_camera.c
@@ -139,8 +139,8 @@
if (!*count)
*count = 32;
- while (*size * *count > MAX_VIDEO_MEM * 1024 * 1024)
- (*count)--;
+ if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024)
+ *count = (MAX_VIDEO_MEM * 1024 * 1024) / *size;
dev_dbg(icd->dev.parent, "count=%d, size=%d\n", *count, *size);
diff --git a/drivers/media/video/omap24xxcam.c b/drivers/media/video/omap24xxcam.c
index ce76d95..f85b2ed 100644
--- a/drivers/media/video/omap24xxcam.c
+++ b/drivers/media/video/omap24xxcam.c
@@ -452,8 +452,8 @@
*size = fh->pix.sizeimage;
/* accessing fh->cam->capture_mem is ok, it's constant */
- while (*size * *cnt > fh->cam->capture_mem)
- (*cnt)--;
+ if (*size * *cnt > fh->cam->capture_mem)
+ *cnt = fh->cam->capture_mem / *size;
return 0;
}
diff --git a/drivers/media/video/pxa_camera.c b/drivers/media/video/pxa_camera.c
index 04bf5c1..7fe70e7 100644
--- a/drivers/media/video/pxa_camera.c
+++ b/drivers/media/video/pxa_camera.c
@@ -253,8 +253,8 @@
if (0 == *count)
*count = 32;
- while (*size * *count > vid_limit * 1024 * 1024)
- (*count)--;
+ if (*size * *count > vid_limit * 1024 * 1024)
+ *count = (vid_limit * 1024 * 1024) / *size;
return 0;
}
diff --git a/drivers/media/video/s2255drv.c b/drivers/media/video/s2255drv.c
index 0092ff5..5ecd41b 100644
--- a/drivers/media/video/s2255drv.c
+++ b/drivers/media/video/s2255drv.c
@@ -702,8 +702,8 @@
if (0 == *count)
*count = S2255_DEF_BUFS;
- while (*size * (*count) > vid_limit * 1024 * 1024)
- (*count)--;
+ if (*size * *count > vid_limit * 1024 * 1024)
+ *count = (vid_limit * 1024 * 1024) / *size;
return 0;
}
diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c
index 7a229eb..9a46f0a 100644
--- a/drivers/media/video/sh_mobile_ceu_camera.c
+++ b/drivers/media/video/sh_mobile_ceu_camera.c
@@ -213,8 +213,8 @@
*count = 2;
if (pcdev->video_limit) {
- while (PAGE_ALIGN(*size) * *count > pcdev->video_limit)
- (*count)--;
+ if (PAGE_ALIGN(*size) * *count > pcdev->video_limit)
+ *count = pcdev->video_limit / PAGE_ALIGN(*size);
}
dev_dbg(icd->dev.parent, "count=%d, size=%d\n", *count, *size);
diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c
index cdbe703..5a736b8 100644
--- a/drivers/media/video/vivi.c
+++ b/drivers/media/video/vivi.c
@@ -749,8 +749,8 @@
if (0 == *count)
*count = 32;
- while (*size * *count > vid_limit * 1024 * 1024)
- (*count)--;
+ if (*size * *count > vid_limit * 1024 * 1024)
+ *count = (vid_limit * 1024 * 1024) / *size;
dprintk(dev, 1, "%s, count=%d, size=%d\n", __func__,
*count, *size);
diff --git a/drivers/media/video/zr364xx.c b/drivers/media/video/zr364xx.c
index 3d4bac2..a82b5bd 100644
--- a/drivers/media/video/zr364xx.c
+++ b/drivers/media/video/zr364xx.c
@@ -376,8 +376,8 @@
if (*count == 0)
*count = ZR364XX_DEF_BUFS;
- while (*size * (*count) > ZR364XX_DEF_BUFS * 1024 * 1024)
- (*count)--;
+ if (*size * *count > ZR364XX_DEF_BUFS * 1024 * 1024)
+ *count = (ZR364XX_DEF_BUFS * 1024 * 1024) / *size;
return 0;
}
diff --git a/drivers/staging/cx25821/cx25821-video.c b/drivers/staging/cx25821/cx25821-video.c
index 91e0db2..a3bea27 100644
--- a/drivers/staging/cx25821/cx25821-video.c
+++ b/drivers/staging/cx25821/cx25821-video.c
@@ -516,8 +516,8 @@
if (0 == *count)
*count = 32;
- while (*size * *count > vid_limit * 1024 * 1024)
- (*count)--;
+ if (*size * *count > vid_limit * 1024 * 1024)
+ *count = (vid_limit * 1024 * 1024) / *size;
return 0;
}