On Wed, Feb 14, 2018 at 08:46:46AM +0800, kbuild test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git vhost
> head: 3d22d7c1190db3209b644b8a13a75a9802b4587f
> commit: b3a8771f409b74c42deee28aee3092fc5d2c8dab [22/23] fw_cfg: write
> vmcoreinfo details
> reproduce:
> # apt-get install sparse
> git checkout b3a8771f409b74c42deee28aee3092fc5d2c8dab
> make ARCH=x86_64 allmodconfig
> make C=1 CF=-D__CHECK_ENDIAN__
Please make sure there are no sparse warnings when you build
a driver.
>
> sparse warnings: (new ones prefixed by >>)
>
> drivers/firmware/qemu_fw_cfg.c:108:28: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:108:28: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:108:28: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:108:28: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:108:28: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:108:28: sparse: cast to restricted __be32
> >> drivers/firmware/qemu_fw_cfg.c:130:36: sparse: incorrect type in
> >> initializer (different base types) @@ expected unsigned long long address
> >> @@ got gned] address @@
> drivers/firmware/qemu_fw_cfg.c:130:36: expected unsigned long long address
> drivers/firmware/qemu_fw_cfg.c:130:36: got restricted __be64
> drivers/firmware/qemu_fw_cfg.c:131:27: sparse: incorrect type in
> initializer (different base types) @@ expected unsigned int length @@ got ed
> int length @@
> drivers/firmware/qemu_fw_cfg.c:131:27: expected unsigned int length
> drivers/firmware/qemu_fw_cfg.c:131:27: got restricted __be32 <noident>
> drivers/firmware/qemu_fw_cfg.c:132:28: sparse: incorrect type in
> initializer (different base types) @@ expected unsigned int control @@ got ed
> int control @@
> drivers/firmware/qemu_fw_cfg.c:132:28: expected unsigned int control
> drivers/firmware/qemu_fw_cfg.c:132:28: got restricted __be32 <noident>
> drivers/firmware/qemu_fw_cfg.c:142:13: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:142:13: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:142:13: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:142:13: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:142:13: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:142:13: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:96:33: sparse: restricted __be16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:96:52: sparse: restricted __le16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:96:33: sparse: restricted __be16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:96:52: sparse: restricted __le16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:96:33: sparse: restricted __be16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:96:52: sparse: restricted __le16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:96:33: sparse: restricted __be16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:96:52: sparse: restricted __le16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:660:17: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:660:17: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:660:17: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:660:17: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:660:17: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:660:17: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:96:33: sparse: restricted __be16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:96:52: sparse: restricted __le16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:670:31: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:670:31: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:670:31: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:670:31: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:670:31: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:670:31: sparse: cast to restricted __be32
> drivers/firmware/qemu_fw_cfg.c:671:33: sparse: cast to restricted __be16
> drivers/firmware/qemu_fw_cfg.c:671:33: sparse: cast to restricted __be16
> drivers/firmware/qemu_fw_cfg.c:671:33: sparse: cast to restricted __be16
> drivers/firmware/qemu_fw_cfg.c:671:33: sparse: cast to restricted __be16
> drivers/firmware/qemu_fw_cfg.c:96:33: sparse: restricted __be16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:96:52: sparse: restricted __le16 degrades
> to integer
> drivers/firmware/qemu_fw_cfg.c:717:22: sparse: cast to restricted __le32
>
> vim +130 drivers/firmware/qemu_fw_cfg.c
>
> 103
> 104 /* qemu fw_cfg device is sync today, but spec says it may
> become async */
> 105 static void fw_cfg_wait_for_control(struct fw_cfg_dma *d)
> 106 {
> 107 do {
> > 108 u32 ctrl = be32_to_cpu(READ_ONCE(d->control));
> 109
> 110 if ((ctrl & ~FW_CFG_DMA_CTL_ERROR) == 0)
> 111 return;
> 112
> 113 usleep_range(50, 100);
> 114 } while (true);
> 115 }
> 116
> 117 static ssize_t fw_cfg_dma_transfer(void *address, u32 length,
> u32 control)
> 118 {
> 119 phys_addr_t dma;
> 120 struct fw_cfg_dma *d = NULL;
> 121 ssize_t ret = length;
> 122
> 123 d = kmalloc(sizeof(*d), GFP_KERNEL);
> 124 if (!d) {
> 125 ret = -ENOMEM;
> 126 goto end;
> 127 }
> 128
> 129 *d = (struct fw_cfg_dma) {
> > 130 .address = address ?
> cpu_to_be64(virt_to_phys(address)) : 0,
> 131 .length = cpu_to_be32(length),
> 132 .control = cpu_to_be32(control)
> 133 };
> 134
> 135 dma = virt_to_phys(d);
> 136
> 137 iowrite32be((u64)dma >> 32, fw_cfg_reg_dma);
> 138 iowrite32be(dma, fw_cfg_reg_dma + 4);
> 139
> 140 fw_cfg_wait_for_control(d);
> 141
> 142 if (be32_to_cpu(READ_ONCE(d->control)) &
> FW_CFG_DMA_CTL_ERROR) {
> 143 ret = -EIO;
> 144 }
> 145
> 146 end:
> 147 kfree(d);
> 148
> 149 return ret;
> 150 }
> 151
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
