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Check whether the max number of data virtqueue pairs was provided when a adding a new device and verify the new value does not exceed device capabilities. In addition, change the arrays holding virtqueue and callback contexts to be dynamically allocated. Signed-off-by: Eli Cohen <elic@nvidia.com> Link: https://lore.kernel.org/r/20220105114646.577224-8-elic@nvidia.com Includes fixup: vdpa/mlx5: fix error handling in mlx5_vdpa_dev_add() Clang build fails with mlx5_vnet.c:2574:6: error: variable 'mvdev' is used uninitialized whenever 'if' condition is true if (!ndev->vqs || !ndev->event_cbs) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ mlx5_vnet.c:2660:14: note: uninitialized use occurs here put_device(&mvdev->vdev.dev); ^~~~~ This because mvdev is set after trying to allocate ndev->vqs,event_cbs. So move the allocation to after mvdev is set but before the arrays are used in init_mvqs() Signed-off-by: Tom Rix <trix@redhat.com> Link: https://lore.kernel.org/r/20220107211352.3940570-1-trix@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Includes fixup: vdpa/mlx5: fix endian-ness for max vqs sparse warnings: (new ones prefixed by >>) >> drivers/vdpa/mlx5/net/mlx5_vnet.c:1247:23: sparse: sparse: cast to restricted __le16 >> drivers/vdpa/mlx5/net/mlx5_vnet.c:1247:23: sparse: sparse: cast from restricted __virtio16 > 1247 num = le16_to_cpu(ndev->config.max_virtqueue_pairs); Address this using the appropriate wrapper. Cc: "Eli Cohen" <elic@nvidia.com> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Eli Cohen <elic@nvidia.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.