* [drm-drm-misc:for-linux-next 10/12] drivers/gpu/drm/ingenic/ingenic-drm-drv.c:239:28: warning: variable 'ipu_state' is uninitialized when used here
@ 2020-07-17 11:36 kernel test robot
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From: kernel test robot @ 2020-07-17 11:36 UTC (permalink / raw)
To: kbuild-all
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tree: git://anongit.freedesktop.org/drm/drm-misc for-linux-next
head: a786e8cab152da7ec8b9859da6e77cb59c7fa789
commit: fc1acf317b01083d47228c0d21cfc0764f37a04e [10/12] drm/ingenic: Add support for the IPU
config: s390-randconfig-r014-20200717 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ed6b578040a85977026c93bf4188f996148f3218)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
git checkout fc1acf317b01083d47228c0d21cfc0764f37a04e
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:19:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
^
In file included from drivers/gpu/drm/ingenic/ingenic-drm-drv.c:11:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:72:
include/asm-generic/io.h:490:45: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:20:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \
^
In file included from drivers/gpu/drm/ingenic/ingenic-drm-drv.c:11:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:72:
include/asm-generic/io.h:490:45: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:21:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \
^
In file included from drivers/gpu/drm/ingenic/ingenic-drm-drv.c:11:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:72:
include/asm-generic/io.h:490:45: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32'
___constant_swab32(x) : \
^
include/uapi/linux/swab.h:22:12: note: expanded from macro '___constant_swab32'
(((__u32)(x) & (__u32)0xff000000UL) >> 24)))
^
In file included from drivers/gpu/drm/ingenic/ingenic-drm-drv.c:11:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:72:
include/asm-generic/io.h:490:45: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:120:12: note: expanded from macro '__swab32'
__fswab32(x))
^
In file included from drivers/gpu/drm/ingenic/ingenic-drm-drv.c:11:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:9:
In file included from arch/s390/include/asm/io.h:72:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:46: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew(cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:46: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel(cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> drivers/gpu/drm/ingenic/ingenic-drm-drv.c:239:28: warning: variable 'ipu_state' is uninitialized when used here [-Wuninitialized]
!(priv->ipu_plane && ipu_state->fb);
^~~~~~~~~
drivers/gpu/drm/ingenic/ingenic-drm-drv.c:208:57: note: initialize the variable 'ipu_state' to silence this warning
struct drm_plane_state *f1_state, *f0_state, *ipu_state;
^
= NULL
21 warnings generated.
vim +/ipu_state +239 drivers/gpu/drm/ingenic/ingenic-drm-drv.c
203
204 static int ingenic_drm_crtc_atomic_check(struct drm_crtc *crtc,
205 struct drm_crtc_state *state)
206 {
207 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
208 struct drm_plane_state *f1_state, *f0_state, *ipu_state;
209 long rate;
210
211 if (!drm_atomic_crtc_needs_modeset(state))
212 return 0;
213
214 if (state->mode.hdisplay > priv->soc_info->max_width ||
215 state->mode.vdisplay > priv->soc_info->max_height)
216 return -EINVAL;
217
218 rate = clk_round_rate(priv->pix_clk,
219 state->adjusted_mode.clock * 1000);
220 if (rate < 0)
221 return rate;
222
223 if (priv->soc_info->has_osd) {
224 f1_state = drm_atomic_get_plane_state(state->state, &priv->f1);
225 f0_state = drm_atomic_get_plane_state(state->state, &priv->f0);
226
227 if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU) && priv->ipu_plane) {
228 ipu_state = drm_atomic_get_plane_state(state->state, priv->ipu_plane);
229
230 /* IPU and F1 planes cannot be enabled at the same time. */
231 if (f1_state->fb && ipu_state->fb) {
232 dev_dbg(priv->dev, "Cannot enable both F1 and IPU\n");
233 return -EINVAL;
234 }
235 }
236
237 /* If all the planes are disabled, we won't get a VBLANK IRQ */
238 priv->no_vblank = !f1_state->fb && !f0_state->fb &&
> 239 !(priv->ipu_plane && ipu_state->fb);
240 }
241
242 return 0;
243 }
244
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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2020-07-17 11:36 [drm-drm-misc:for-linux-next 10/12] drivers/gpu/drm/ingenic/ingenic-drm-drv.c:239:28: warning: variable 'ipu_state' is uninitialized when used here kernel test robot
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