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A mirror of the official Linux kernel repository just in case
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When unregistering a remote port the lpfc driver would eventually wait for the remoteport_unreg done callback. But the driver never completed the io aborts that would allow the connections to terminate thus the unreg done callback was never issued. Turns out the coding style of the driver allowed for the wait to occur on the same cpu that the deferred isr is called on. The blocking for the wait, blocked the isr, and as the isr didn't run, the io aborts wouldn't finish. Turns out there was never a good reason to block waiting for the unreg done in the first place. The driver can continue execution and the ref counting within the driver will do the right thing. Resolve by removing the wait and patching up a few cases where the ref counting didn't look right - mainly cases where the remote port comes back before the aborts had completed and the unreg done had been called. Additionally, a few places which used pointer values to guide driver actions weren't protected by lock, so correct those. Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com> Signed-off-by: James Smart <james.smart@broadcom.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> |
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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.