PCI: brcmstb: Fix error path after a call to regulator_bulk_get()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: PCI: brcmstb: Fix error path after a call to regulator_bulk_get() If the regulator_bulk_get() returns an error and no regulators are created, we need to set their number to zero. If we don't do this and the PCIe link up fails, a call to the regulator_bulk_free() will result in a kernel panic. While at it, print the error value, as we cannot return an error upwards as the kernel will WARN() on an error from add_bus(). [kwilczynski: commit log, use comma in the message to match style with other similar messages]

References

• https://git.kernel.org/stable/c/99a0efba9f903acbdece548862b6b4cbe7d999e1
• https://git.kernel.org/stable/c/eedd054834930b8d678f0776cd4b091b8fffbb4a
• https://git.kernel.org/stable/c/df63321a40cc98e52313cffbff376b8ae9ceffa7
• https://git.kernel.org/stable/c/7842e842a9bf6bd5866c84f588353711d131ab1a
• https://git.kernel.org/stable/c/6f44e1fdb006db61394aa4d4c25728ada00842e7
• https://git.kernel.org/stable/c/3651ad5249c51cf7eee078e12612557040a6bdb4