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nvme: don't enable AEN if not supported 

Avoid excuting set_feature command if there is no supported bit in
Optional Asynchronous Events Supported (OAES).

Fixes: c0561f82 ("nvme: submit AEN event configuration on startup")
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Weiping Zhang <zhangweiping@didichuxing.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Weiping Zhang 2018-07-03 00:34:38 +08:00 committed by Christoph Hellwig
parent cf39a6bc34
commit fa441b71aa
1 changed files with 7 additions and 4 deletions
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11
drivers/nvme/host/core.c
View File

@ -1060,14 +1060,17 @@ EXPORT_SYMBOL_GPL(nvme_set_queue_count);
static void nvme_enable_aen(struct nvme_ctrl *ctrl)
{
u32 result;
u32 result, supported_aens = ctrl->oaes & NVME_AEN_SUPPORTED;
int status;
status = nvme_set_features(ctrl, NVME_FEAT_ASYNC_EVENT,
ctrl->oaes & NVME_AEN_SUPPORTED, NULL, 0, &result);
if (!supported_aens)
return;
status = nvme_set_features(ctrl, NVME_FEAT_ASYNC_EVENT, supported_aens,
NULL, 0, &result);
if (status)
dev_warn(ctrl->device, "Failed to configure AEN (cfg %x)\n",
ctrl->oaes & NVME_AEN_SUPPORTED);
supported_aens);
}
static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)