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nvme-pci: simplify nvme_dbbuf_dma_alloc

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Move the OACS check and the error checking into nvme_dbbuf_dma_alloc so
that an upcoming second caller doesn't have to duplicate this boilerplate
code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
This commit is contained in:
Christoph Hellwig 2022-11-08 10:56:49 +01:00
parent a6ee7f19eb
commit 65a5464642
1 changed files with 16 additions and 16 deletions
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32
drivers/nvme/host/pci.c
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@ -239,10 +239,13 @@ static inline unsigned int nvme_dbbuf_size(struct nvme_dev *dev)
return dev->nr_allocated_queues * 8 * dev->db_stride;
}
static int nvme_dbbuf_dma_alloc(struct nvme_dev *dev)
static void nvme_dbbuf_dma_alloc(struct nvme_dev *dev)
{
unsigned int mem_size = nvme_dbbuf_size(dev);
if (!(dev->ctrl.oacs & NVME_CTRL_OACS_DBBUF_SUPP))
return;
if (dev->dbbuf_dbs) {
/*
* Clear the dbbuf memory so the driver doesn't observe stale
@ -250,25 +253,27 @@ static int nvme_dbbuf_dma_alloc(struct nvme_dev *dev)
*/
memset(dev->dbbuf_dbs, 0, mem_size);
memset(dev->dbbuf_eis, 0, mem_size);
return 0;
return;
}
dev->dbbuf_dbs = dma_alloc_coherent(dev->dev, mem_size,
&dev->dbbuf_dbs_dma_addr,
GFP_KERNEL);
if (!dev->dbbuf_dbs)
return -ENOMEM;
goto fail;
dev->dbbuf_eis = dma_alloc_coherent(dev->dev, mem_size,
&dev->dbbuf_eis_dma_addr,
GFP_KERNEL);
if (!dev->dbbuf_eis) {
dma_free_coherent(dev->dev, mem_size,
dev->dbbuf_dbs, dev->dbbuf_dbs_dma_addr);
dev->dbbuf_dbs = NULL;
return -ENOMEM;
}
if (!dev->dbbuf_eis)
goto fail_free_dbbuf_dbs;
return;
return 0;
fail_free_dbbuf_dbs:
dma_free_coherent(dev->dev, mem_size, dev->dbbuf_dbs,
dev->dbbuf_dbs_dma_addr);
dev->dbbuf_dbs = NULL;
fail:
dev_warn(dev->dev, "unable to allocate dma for dbbuf\n");
}
static void nvme_dbbuf_dma_free(struct nvme_dev *dev)
@ -2855,12 +2860,7 @@ static void nvme_reset_work(struct work_struct *work)
if (result)
goto out;
if (dev->ctrl.oacs & NVME_CTRL_OACS_DBBUF_SUPP) {
result = nvme_dbbuf_dma_alloc(dev);
if (result)
dev_warn(dev->dev,
"unable to allocate dma for dbbuf\n");
}
nvme_dbbuf_dma_alloc(dev);
if (dev->ctrl.hmpre) {
result = nvme_setup_host_mem(dev);