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Fix nvme initiator handline when CONFIG_LPFC_NVME_INITIATOR is not enabled. With update nvme upstream driver sources, loading the driver with nvme enabled resulting in this Oops. BUG: unable to handle kernel NULL pointer dereference at 0000000000000018 IP: lpfc_nvme_update_localport+0x23/0xd0 [lpfc] PGD 0 Oops: 0000 [#1] SMP CPU: 0 PID: 10256 Comm: lpfc_worker_0 Tainted Hardware name: ... task: ffff881028191c40 task.stack: ffff880ffdf00000 RIP: 0010:lpfc_nvme_update_localport+0x23/0xd0 [lpfc] RSP: 0018:ffff880ffdf03c20 EFLAGS: 00010202 Cause: As the initiator driver completes discovery at different stages, it call lpfc_nvme_update_localport to hint that the DID and role may have changed. In the implementation of lpfc_nvme_update_localport, the driver was not validating the localport or the lport during the execution of the update_localport routine. With the recent upstream additions to the driver, the create_localport routine didn't run and so the localport was NULL causing the page-fault Oops. Fix: Add the CONFIG_LPFC_NVME_INITIATOR preprocessor inclusions to lpfc_nvme_update_localport to turn off all routine processing when the running kernel does not have NVME configured. Add NULL pointer checks on the localport and lport in lpfc_nvme_update_localport and dump messages if they are NULL and just exit. Also one alingment issue fixed. Repalces the ifdef with the IS_ENABLED macro. Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <james.smart@broadcom.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.