diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2019-03-05 16:26:29 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-03-20 13:33:08 +0300 |
| commit | c3c2eca87dcded3626bc8f3a1b8bfa4b9f078fb1 (patch) | |
| tree | a0be384acc743d7a841478e65ffb3ca43987309e | |
| parent | 948dff7cfa1d7653e7828e7b905863bd24ca5c02 (diff) | |
| download | linux-c3c2eca87dcded3626bc8f3a1b8bfa4b9f078fb1.tar.xz | |
media: staging/intel-ipu3: reduce kernel stack usage
The imgu_css_queue structure is too large to be put on the kernel
stack, as we can see in 32-bit builds:
drivers/staging/media/ipu3/ipu3-css.c: In function 'imgu_css_fmt_try':
drivers/staging/media/ipu3/ipu3-css.c:1863:1: error: the frame size of 1172 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
By dynamically allocating this array, the stack usage goes down to an
acceptable 140 bytes for the same x86-32 configuration.
Fixes: f5f2e4273518 ("media: staging/intel-ipu3: Add css pipeline programming")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Cao, Bingbu <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
| -rw-r--r-- | drivers/staging/media/ipu3/ipu3-css.c | 35 |
1 files changed, 23 insertions, 12 deletions
diff --git a/drivers/staging/media/ipu3/ipu3-css.c b/drivers/staging/media/ipu3/ipu3-css.c index 15ab77e4b766..e7f1898874fd 100644 --- a/drivers/staging/media/ipu3/ipu3-css.c +++ b/drivers/staging/media/ipu3/ipu3-css.c @@ -3,6 +3,7 @@ #include <linux/device.h> #include <linux/iopoll.h> +#include <linux/slab.h> #include "ipu3-css.h" #include "ipu3-css-fw.h" @@ -1744,15 +1745,18 @@ int imgu_css_fmt_try(struct imgu_css *css, struct v4l2_rect *const bds = &r[IPU3_CSS_RECT_BDS]; struct v4l2_rect *const env = &r[IPU3_CSS_RECT_ENVELOPE]; struct v4l2_rect *const gdc = &r[IPU3_CSS_RECT_GDC]; - struct imgu_css_queue q[IPU3_CSS_QUEUES]; - struct v4l2_pix_format_mplane *const in = - &q[IPU3_CSS_QUEUE_IN].fmt.mpix; - struct v4l2_pix_format_mplane *const out = - &q[IPU3_CSS_QUEUE_OUT].fmt.mpix; - struct v4l2_pix_format_mplane *const vf = - &q[IPU3_CSS_QUEUE_VF].fmt.mpix; + struct imgu_css_queue *q; + struct v4l2_pix_format_mplane *in, *out, *vf; int i, s, ret; + q = kcalloc(IPU3_CSS_QUEUES, sizeof(struct imgu_css_queue), GFP_KERNEL); + if (!q) + return -ENOMEM; + + in = &q[IPU3_CSS_QUEUE_IN].fmt.mpix; + out = &q[IPU3_CSS_QUEUE_OUT].fmt.mpix; + vf = &q[IPU3_CSS_QUEUE_VF].fmt.mpix; + /* Adjust all formats, get statistics buffer sizes and formats */ for (i = 0; i < IPU3_CSS_QUEUES; i++) { if (fmts[i]) @@ -1766,7 +1770,8 @@ int imgu_css_fmt_try(struct imgu_css *css, IPU3_CSS_QUEUE_TO_FLAGS(i))) { dev_notice(css->dev, "can not initialize queue %s\n", qnames[i]); - return -EINVAL; + ret = -EINVAL; + goto out; } } for (i = 0; i < IPU3_CSS_RECTS; i++) { @@ -1788,7 +1793,8 @@ int imgu_css_fmt_try(struct imgu_css *css, if (!imgu_css_queue_enabled(&q[IPU3_CSS_QUEUE_IN]) || !imgu_css_queue_enabled(&q[IPU3_CSS_QUEUE_OUT])) { dev_warn(css->dev, "required queues are disabled\n"); - return -EINVAL; + ret = -EINVAL; + goto out; } if (!imgu_css_queue_enabled(&q[IPU3_CSS_QUEUE_OUT])) { @@ -1829,7 +1835,8 @@ int imgu_css_fmt_try(struct imgu_css *css, ret = imgu_css_find_binary(css, pipe, q, r); if (ret < 0) { dev_err(css->dev, "failed to find suitable binary\n"); - return -EINVAL; + ret = -EINVAL; + goto out; } css->pipes[pipe].bindex = ret; @@ -1843,7 +1850,8 @@ int imgu_css_fmt_try(struct imgu_css *css, IPU3_CSS_QUEUE_TO_FLAGS(i))) { dev_err(css->dev, "final resolution adjustment failed\n"); - return -EINVAL; + ret = -EINVAL; + goto out; } *fmts[i] = q[i].fmt.mpix; } @@ -1859,7 +1867,10 @@ int imgu_css_fmt_try(struct imgu_css *css, bds->width, bds->height, gdc->width, gdc->height, out->width, out->height, vf->width, vf->height); - return 0; + ret = 0; +out: + kfree(q); + return ret; } int imgu_css_fmt_set(struct imgu_css *css, |