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Change History

In the Linux kernel, the following vulnerability has been resolved:

scsi: ufs: core: Fix invalid probe error return value

After DME Link Startup, the error return value is set to the MIPI UniPro
GenericErrorCode which can be 0 (SUCCESS) or 1 (FAILURE).  Upon failure
during driver probe, the error code 1 is propagated back to the driver
probe function which must return a negative value to indicate an error,
but 1 is not negative, so the probe is considered to be successful even
though it failed.  Subsequently, removing the driver results in an oops
because it is not in a valid state.

This happens because none of the callers of ufshcd_init() expect a
non-negative error code.

Fix the return value and documentation to match actual usage.

https://git.kernel.org/stable/c/a2b32bc1d9e359a9f90d0de6af16699facb10935

https://git.kernel.org/stable/c/df96dbe1af7f6591c09f862f1226d3619b07e1b6