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Date: Thu, 25 Nov 2021 10:03:28 +0300
From: Dan Carpenter <dan.carpenter@...cle.com>
To: kbuild@...ts.01.org, Parav Pandit <parav@...dia.com>
Cc: lkp@...el.com, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org,
"Michael S. Tsirkin" <mst@...hat.com>, Eli Cohen <elic@...dia.com>,
Jason Wang <jasowang@...hat.com>,
Eric Dumazet <edumazet@...gle.com>
Subject: drivers/vdpa/vdpa.c:296 vdpa_mgmtdev_fill() warn: should '(((1))) <<
(mdev->id_table[i]->device)' be a 64 bit type?
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 5d9f4cf36721aba199975a9be7863a3ff5cd4b59
commit: 33b347503f014ebf76257327cbc7001c6b721956 vdpa: Define vdpa mgmt device, ops and a netlink interface
config: i386-randconfig-m021-20211118 (https://download.01.org/0day-ci/archive/20211125/202111250317.VUsGtdox-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
smatch warnings:
drivers/vdpa/vdpa.c:296 vdpa_mgmtdev_fill() warn: should '(((1))) << (mdev->id_table[i]->device)' be a 64 bit type?
vim +296 drivers/vdpa/vdpa.c
33b347503f014eb Parav Pandit 2021-01-05 280 static int vdpa_mgmtdev_fill(const struct vdpa_mgmt_dev *mdev, struct sk_buff *msg,
33b347503f014eb Parav Pandit 2021-01-05 281 u32 portid, u32 seq, int flags)
33b347503f014eb Parav Pandit 2021-01-05 282 {
33b347503f014eb Parav Pandit 2021-01-05 283 u64 supported_classes = 0;
^^^^^^^^^^^^^^^^^^^^^
This is a u64
33b347503f014eb Parav Pandit 2021-01-05 284 void *hdr;
33b347503f014eb Parav Pandit 2021-01-05 285 int i = 0;
33b347503f014eb Parav Pandit 2021-01-05 286 int err;
33b347503f014eb Parav Pandit 2021-01-05 287
33b347503f014eb Parav Pandit 2021-01-05 288 hdr = genlmsg_put(msg, portid, seq, &vdpa_nl_family, flags, VDPA_CMD_MGMTDEV_NEW);
33b347503f014eb Parav Pandit 2021-01-05 289 if (!hdr)
33b347503f014eb Parav Pandit 2021-01-05 290 return -EMSGSIZE;
33b347503f014eb Parav Pandit 2021-01-05 291 err = vdpa_nl_mgmtdev_handle_fill(msg, mdev);
33b347503f014eb Parav Pandit 2021-01-05 292 if (err)
33b347503f014eb Parav Pandit 2021-01-05 293 goto msg_err;
33b347503f014eb Parav Pandit 2021-01-05 294
33b347503f014eb Parav Pandit 2021-01-05 295 while (mdev->id_table[i].device) {
33b347503f014eb Parav Pandit 2021-01-05 @296 supported_classes |= BIT(mdev->id_table[i].device);
Which suggests that this should be BIT_ULL().
33b347503f014eb Parav Pandit 2021-01-05 297 i++;
33b347503f014eb Parav Pandit 2021-01-05 298 }
33b347503f014eb Parav Pandit 2021-01-05 299
33b347503f014eb Parav Pandit 2021-01-05 300 if (nla_put_u64_64bit(msg, VDPA_ATTR_MGMTDEV_SUPPORTED_CLASSES,
33b347503f014eb Parav Pandit 2021-01-05 301 supported_classes, VDPA_ATTR_UNSPEC)) {
33b347503f014eb Parav Pandit 2021-01-05 302 err = -EMSGSIZE;
33b347503f014eb Parav Pandit 2021-01-05 303 goto msg_err;
33b347503f014eb Parav Pandit 2021-01-05 304 }
33b347503f014eb Parav Pandit 2021-01-05 305
33b347503f014eb Parav Pandit 2021-01-05 306 genlmsg_end(msg, hdr);
33b347503f014eb Parav Pandit 2021-01-05 307 return 0;
33b347503f014eb Parav Pandit 2021-01-05 308
33b347503f014eb Parav Pandit 2021-01-05 309 msg_err:
33b347503f014eb Parav Pandit 2021-01-05 310 genlmsg_cancel(msg, hdr);
33b347503f014eb Parav Pandit 2021-01-05 311 return err;
33b347503f014eb Parav Pandit 2021-01-05 312 }
---
0-DAY CI Kernel Test Service, Intel Corporation
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