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bus/pci: fix VFIO device reset

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If the device is not capable of resetting, then Linux kernel updates
the errno as EINVAL.
http://elixir.free-electrons.com/linux/v4.9/source/drivers/vfio/pci/vfio_pci.c#L887

Honor the EINVAL errno value to avoid pci vfio setup failure.

Fixes: f25f8f367644 ("bus/pci: check VFIO reset ioctl error")

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Reviewed-by: Jonas Pfefferle <jpf@zurich.ibm.com>
This commit is contained in:
Jerin Jacob 2017-10-28 11:52:55 +05:30 committed by Thomas Monjalon
parent bc104bb853
commit 6fb00f8bae
1 changed files with 5 additions and 2 deletions
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7
drivers/bus/pci/linux/pci_vfio.c
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@ -338,8 +338,11 @@ pci_vfio_setup_device(struct rte_pci_device *dev, int vfio_dev_fd)
return -1; return -1;
} }
/* Reset the device */ /*
if (ioctl(vfio_dev_fd, VFIO_DEVICE_RESET)) { * Reset the device. If the device is not capable of resetting,
* then it updates errno as EINVAL.
*/
if (ioctl(vfio_dev_fd, VFIO_DEVICE_RESET) && errno != EINVAL) {
RTE_LOG(ERR, EAL, "Unable to reset device! Error: %d (%s)\n", RTE_LOG(ERR, EAL, "Unable to reset device! Error: %d (%s)\n",
errno, strerror(errno)); errno, strerror(errno));
return -1; return -1;