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authorChristoph Hellwig <hch@lst.de>2017-09-06 12:19:57 +0200
committerChristoph Hellwig <hch@lst.de>2017-09-11 12:29:39 -0400
commit9620cfba97a8b88ae91f0e275e8ff110b578bb6e (patch)
tree591211f3cfce61222eaba39f703529f8dc88ccfb /drivers/nvme
parent30f92d62e5b41a94de2d0bbd677a6ea2fcfed74f (diff)
downloadlinux-9620cfba97a8b88ae91f0e275e8ff110b578bb6e.tar.bz2
nvme-pci: propagate (some) errors from host memory buffer setup
We want to catch command execution errors when resetting the device, so propagate errors from the Set Features when setting up the host memory buffer. We keep ignoring memory allocation failures, as the spec clearly says that the controller must work without a host memory buffer. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <keith.busch@intel.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/pci.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index a370f702fceb..5ed12fbfaad6 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1693,12 +1693,13 @@ static int nvme_alloc_host_mem(struct nvme_dev *dev, u64 min, u64 preferred)
return -ENOMEM;
}
-static void nvme_setup_host_mem(struct nvme_dev *dev)
+static int nvme_setup_host_mem(struct nvme_dev *dev)
{
u64 max = (u64)max_host_mem_size_mb * SZ_1M;
u64 preferred = (u64)dev->ctrl.hmpre * 4096;
u64 min = (u64)dev->ctrl.hmmin * 4096;
u32 enable_bits = NVME_HOST_MEM_ENABLE;
+ int ret = 0;
preferred = min(preferred, max);
if (min > max) {
@@ -1706,7 +1707,7 @@ static void nvme_setup_host_mem(struct nvme_dev *dev)
"min host memory (%lld MiB) above limit (%d MiB).\n",
min >> ilog2(SZ_1M), max_host_mem_size_mb);
nvme_free_host_mem(dev);
- return;
+ return 0;
}
/*
@@ -1723,7 +1724,7 @@ static void nvme_setup_host_mem(struct nvme_dev *dev)
if (nvme_alloc_host_mem(dev, min, preferred)) {
dev_warn(dev->ctrl.device,
"failed to allocate host memory buffer.\n");
- return;
+ return 0; /* controller must work without HMB */
}
dev_info(dev->ctrl.device,
@@ -1731,8 +1732,10 @@ static void nvme_setup_host_mem(struct nvme_dev *dev)
dev->host_mem_size >> ilog2(SZ_1M));
}
- if (nvme_set_host_mem(dev, enable_bits))
+ ret = nvme_set_host_mem(dev, enable_bits);
+ if (ret)
nvme_free_host_mem(dev);
+ return ret;
}
static int nvme_setup_io_queues(struct nvme_dev *dev)
@@ -2176,8 +2179,11 @@ static void nvme_reset_work(struct work_struct *work)
"unable to allocate dma for dbbuf\n");
}
- if (dev->ctrl.hmpre)
- nvme_setup_host_mem(dev);
+ if (dev->ctrl.hmpre) {
+ result = nvme_setup_host_mem(dev);
+ if (result < 0)
+ goto out;
+ }
result = nvme_setup_io_queues(dev);
if (result)