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Message-ID: <7e8141cb-44e6-477c-b77e-aa9b4bc5af3a@stanley.mountain>
Date: Mon, 16 Sep 2024 10:35:28 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: oe-kbuild@...ts.linux.dev, Srujana Challa <schalla@...vell.com>
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org, "Michael S. Tsirkin" <mst@...hat.com>,
Vamsi Attunuru <vattunuru@...vell.com>,
Shijith Thotton <sthotton@...vell.com>,
Nithin Dabilpuram <ndabilpuram@...vell.com>
Subject: drivers/vdpa/octeon_ep/octep_vdpa_hw.c:143 octep_process_mbox()
warn: missing error code? 'ret'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 98f7e32f20d28ec452afb208f9cffc08448a2652
commit: 8b6c724cdab85d8923dd8c474a5a9464228379c5 virtio: vdpa: vDPA driver for Marvell OCTEON DPU devices
date: 10 weeks ago
config: i386-randconfig-141-20240912 (https://download.01.org/0day-ci/archive/20240916/202409160431.bRhZWhiU-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
| Closes: https://lore.kernel.org/r/202409160431.bRhZWhiU-lkp@intel.com/
New smatch warnings:
drivers/vdpa/octeon_ep/octep_vdpa_hw.c:143 octep_process_mbox() warn: missing error code? 'ret'
drivers/vdpa/octeon_ep/octep_vdpa_hw.c:478 octep_hw_caps_read() warn: argument 3 to %016llx specifier is cast from pointer
Old smatch warnings:
drivers/vdpa/octeon_ep/octep_vdpa_hw.c:479 octep_hw_caps_read() warn: argument 3 to %016llx specifier is cast from pointer
drivers/vdpa/octeon_ep/octep_vdpa_hw.c:480 octep_hw_caps_read() warn: argument 3 to %016llx specifier is cast from pointer
drivers/vdpa/octeon_ep/octep_vdpa_hw.c:481 octep_hw_caps_read() warn: argument 3 to %016llx specifier is cast from pointer
drivers/vdpa/octeon_ep/octep_vdpa_hw.c:514 octep_hw_caps_read() warn: argument 3 to %016llx specifier is cast from pointer
vim +/ret +143 drivers/vdpa/octeon_ep/octep_vdpa_hw.c
8b6c724cdab85d Srujana Challa 2024-06-14 102 static int octep_process_mbox(struct octep_hw *oct_hw, u16 id, u16 qid, void *buffer,
8b6c724cdab85d Srujana Challa 2024-06-14 103 u32 buf_size, bool write)
8b6c724cdab85d Srujana Challa 2024-06-14 104 {
8b6c724cdab85d Srujana Challa 2024-06-14 105 struct octep_mbox __iomem *mbox = octep_get_mbox(oct_hw);
8b6c724cdab85d Srujana Challa 2024-06-14 106 struct pci_dev *pdev = oct_hw->pdev;
8b6c724cdab85d Srujana Challa 2024-06-14 107 u32 *p = (u32 *)buffer;
8b6c724cdab85d Srujana Challa 2024-06-14 108 u16 data_wds;
8b6c724cdab85d Srujana Challa 2024-06-14 109 int ret, i;
8b6c724cdab85d Srujana Challa 2024-06-14 110 u32 val;
8b6c724cdab85d Srujana Challa 2024-06-14 111
8b6c724cdab85d Srujana Challa 2024-06-14 112 if (!IS_ALIGNED(buf_size, 4))
8b6c724cdab85d Srujana Challa 2024-06-14 113 return -EINVAL;
8b6c724cdab85d Srujana Challa 2024-06-14 114
8b6c724cdab85d Srujana Challa 2024-06-14 115 /* Make sure mbox space is available */
8b6c724cdab85d Srujana Challa 2024-06-14 116 ret = octep_wait_for_mbox_avail(mbox);
8b6c724cdab85d Srujana Challa 2024-06-14 117 if (ret) {
8b6c724cdab85d Srujana Challa 2024-06-14 118 dev_warn(&pdev->dev, "Timeout waiting for previous mbox data to be consumed\n");
8b6c724cdab85d Srujana Challa 2024-06-14 119 return ret;
8b6c724cdab85d Srujana Challa 2024-06-14 120 }
8b6c724cdab85d Srujana Challa 2024-06-14 121 data_wds = buf_size / 4;
8b6c724cdab85d Srujana Challa 2024-06-14 122
8b6c724cdab85d Srujana Challa 2024-06-14 123 if (write) {
8b6c724cdab85d Srujana Challa 2024-06-14 124 for (i = 1; i <= data_wds; i++) {
8b6c724cdab85d Srujana Challa 2024-06-14 125 octep_write32_word(mbox, i, *p);
8b6c724cdab85d Srujana Challa 2024-06-14 126 p++;
8b6c724cdab85d Srujana Challa 2024-06-14 127 }
8b6c724cdab85d Srujana Challa 2024-06-14 128 }
8b6c724cdab85d Srujana Challa 2024-06-14 129 octep_write32_word(mbox, 0, (u32)qid);
8b6c724cdab85d Srujana Challa 2024-06-14 130 octep_write_sts(mbox, 0);
8b6c724cdab85d Srujana Challa 2024-06-14 131
8b6c724cdab85d Srujana Challa 2024-06-14 132 octep_write_hdr(mbox, id, MBOX_REQ_SIG);
8b6c724cdab85d Srujana Challa 2024-06-14 133
8b6c724cdab85d Srujana Challa 2024-06-14 134 ret = octep_wait_for_mbox_rsp(mbox);
8b6c724cdab85d Srujana Challa 2024-06-14 135 if (ret) {
8b6c724cdab85d Srujana Challa 2024-06-14 136 dev_warn(&pdev->dev, "Timeout waiting for mbox : %d response\n", id);
8b6c724cdab85d Srujana Challa 2024-06-14 137 return ret;
8b6c724cdab85d Srujana Challa 2024-06-14 138 }
8b6c724cdab85d Srujana Challa 2024-06-14 139
8b6c724cdab85d Srujana Challa 2024-06-14 140 val = octep_read_sig(mbox);
8b6c724cdab85d Srujana Challa 2024-06-14 141 if ((val & 0xFFFF) != MBOX_RSP_SIG) {
8b6c724cdab85d Srujana Challa 2024-06-14 142 dev_warn(&pdev->dev, "Invalid Signature from mbox : %d response\n", id);
8b6c724cdab85d Srujana Challa 2024-06-14 @143 return ret;
return -EINVAL;
The other warnings are because we should use %p to print pointers. Depening on
the .config the kernel will mask out pointers so that they aren't disclosed to
the users. Otherwise it risks being an information leak to defeat KSALR.
8b6c724cdab85d Srujana Challa 2024-06-14 144 }
8b6c724cdab85d Srujana Challa 2024-06-14 145
8b6c724cdab85d Srujana Challa 2024-06-14 146 val = octep_read_sts(mbox);
8b6c724cdab85d Srujana Challa 2024-06-14 147 if (val & MBOX_RC_MASK) {
8b6c724cdab85d Srujana Challa 2024-06-14 148 ret = MBOX_RSP_TO_ERR(val);
8b6c724cdab85d Srujana Challa 2024-06-14 149 dev_warn(&pdev->dev, "Error while processing mbox : %d, err %d\n", id, ret);
8b6c724cdab85d Srujana Challa 2024-06-14 150 return ret;
8b6c724cdab85d Srujana Challa 2024-06-14 151 }
8b6c724cdab85d Srujana Challa 2024-06-14 152
8b6c724cdab85d Srujana Challa 2024-06-14 153 if (!write)
8b6c724cdab85d Srujana Challa 2024-06-14 154 for (i = 1; i <= data_wds; i++)
8b6c724cdab85d Srujana Challa 2024-06-14 155 *p++ = octep_read32_word(mbox, i);
8b6c724cdab85d Srujana Challa 2024-06-14 156
8b6c724cdab85d Srujana Challa 2024-06-14 157 return 0;
8b6c724cdab85d Srujana Challa 2024-06-14 158 }
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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