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During tolerance tests that force an HBA to become unresponsive, rmmod hangs resulting in the inability to remove the driver. The lpfc_pci_remove_one_s4() routine attempts to submit a clean up mailbox command via the lpfc_sli4_post_sync_mbox() routine, but ends up waiting forever for a mailbox register to set its ready bit. Because the HBA is in an unrecoverable and unresponsive state, the ready bit will never be set. Create a new routine called lpfc_sli4_unrecoverable_port(), which checks a port status register's error notification bits. Use the lpfc_sli4_unrecoverable_port() routine in ready bit check routines to early return error if port is deemed unrecoverable. Also, when the lpfc_handle_eratt_s4() handler detects an unrecoverable state, call the lpfc_sli4_offline_eratt() routine to kick off flushing outstanding I/O. Signed-off-by: Justin Tee <justin.tee@broadcom.com> Link: https://lore.kernel.org/r/20230301231626.9621-8-justintee8345@gmail.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.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.