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The patch 1da177e4c3: "Linux-2.6.12-rc2" from Apr 16, 2005
(linux-next), leads to the following Smatch static checker warning:
drivers/infiniband/hw/mthca/mthca_cmd.c:644 mthca_SYS_EN()
error: uninitialized symbol 'out'.
drivers/infiniband/hw/mthca/mthca_cmd.c
636 int mthca_SYS_EN(struct mthca_dev *dev)
637 {
638 u64 out;
639 int ret;
640
641 ret = mthca_cmd_imm(dev, 0, &out, 0, 0, CMD_SYS_EN, CMD_TIME_CLASS_D);
We pass out here and it gets used without being initialized.
err = mthca_cmd_post(dev, in_param,
out_param ? *out_param : 0,
^^^^^^^^^^
in_modifier, op_modifier,
op, context->token, 1);
It's the same in mthca_cmd_wait() and mthca_cmd_poll().
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/all/533bc3df-8078-4397-b93d-d1f6cec9b636@moroto.mountain
Link: https://lore.kernel.org/r/c559cb7113158c02d75401ac162652072ef1b5f0.1699867650.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
b9a85e5eec