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H A D | pci.c | 2a5bcfdd Sat May 02 02:29:41 CDT 2020 Weiping Zhang <zhangweiping@didiglobal.com> nvme-pci: align io queue count with allocted nvme_queue in nvme_probe
Since commit 147b27e4bd08 ("nvme-pci: allocate device queues storage space at probe"), nvme_alloc_queue does not alloc the nvme queues itself anymore.
If the write/poll_queues module parameters are changed at runtime to values larger than the number of allocated queues in nvme_probe, nvme_alloc_queue will access unallocated memory.
Add a new nr_allocated_queues member to struct nvme_dev to record how many queues were alloctated in nvme_probe to avoid using more than the allocated queues after a reset following a change to the write/poll_queues module parameters.
Also add nr_write_queues and nr_poll_queues members to allow refreshing the number of write and poll queues based on a change to the module parameters when resetting the controller.
Fixes: 147b27e4bd08 ("nvme-pci: allocate device queues storage space at probe") Signed-off-by: Weiping Zhang <zhangweiping@didiglobal.com> Reviewed-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Max Gurtovoy <maxg@mellanox.com> [hch: add nvme_max_io_queues, update the commit message] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk> 2a5bcfdd Sat May 02 02:29:41 CDT 2020 Weiping Zhang <zhangweiping@didiglobal.com> nvme-pci: align io queue count with allocted nvme_queue in nvme_probe Since commit 147b27e4bd08 ("nvme-pci: allocate device queues storage space at probe"), nvme_alloc_queue does not alloc the nvme queues itself anymore. If the write/poll_queues module parameters are changed at runtime to values larger than the number of allocated queues in nvme_probe, nvme_alloc_queue will access unallocated memory. Add a new nr_allocated_queues member to struct nvme_dev to record how many queues were alloctated in nvme_probe to avoid using more than the allocated queues after a reset following a change to the write/poll_queues module parameters. Also add nr_write_queues and nr_poll_queues members to allow refreshing the number of write and poll queues based on a change to the module parameters when resetting the controller. Fixes: 147b27e4bd08 ("nvme-pci: allocate device queues storage space at probe") Signed-off-by: Weiping Zhang <zhangweiping@didiglobal.com> Reviewed-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Max Gurtovoy <maxg@mellanox.com> [hch: add nvme_max_io_queues, update the commit message] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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