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Enable bus mastering on the device before resetting the device. The

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card has to do PCIe transactions to complete the reset process, but
can't do them, per the PCIe spec, unless bus mastering is enabled.

Submitted by: Kinjal Patel
PR: 22166
This commit is contained in:
Warner Losh 2017-08-25 03:15:18 +00:00
parent 0c7a1e15ad
commit abb61405a6
1 changed files with 6 additions and 2 deletions
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8
sys/dev/nvme/nvme.c
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@ -245,6 +245,12 @@ nvme_attach(device_t dev)
return (status);
}
/*
* Enable busmastering so the completion status messages can
* be busmastered back to the host.
*/
pci_enable_busmaster(dev);
/*
* Reset controller twice to ensure we do a transition from cc.en==1
* to cc.en==0. This is because we don't really know what status
@ -262,8 +268,6 @@ nvme_attach(device_t dev)
return (status);
}
pci_enable_busmaster(dev);
ctrlr->config_hook.ich_func = nvme_ctrlr_start_config_hook;
ctrlr->config_hook.ich_arg = ctrlr;