[PATCH v2 0/5] pci_endpoint_test: Fix the return value of IOCTLs

[Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>]

During the review of a patch for pci_endpoint_test driver [1], Greg spotted
the wrong usage of the return value of IOCTLs in the driver. This series
fixes that by returning 0 for success and negative error code for failure.
Relevant change is also made to the userspace tool and the Documentation.

Along with those, there are couple more patches fixing other small issues
I noted.

NOTE: I have just compile tested this series. So it'd be good if someone
can test it on the PCI endpoint setup.

Thanks,
Mani

[1] https://lore.kernel.org/all/20220816100617.90720-1-mie@igel.co.jp/

Changes in v2:

* Fixed the error numbers in pci_endpoint_test
* Added Fixes tag and CCed stable list for relevant patches. The patches
  should get backported until 5.10 kernel only. Since for the LTS kernels
  before that, the pci_endpoint_test driver was not supporting all commands.

Manivannan Sadhasivam (5):
  misc: pci_endpoint_test: Fix the return value of IOCTL
  tools: PCI: Fix parsing the return value of IOCTLs
  Documentation: PCI: endpoint: Use the correct return value of
    pcitest.sh
  misc: pci_endpoint_test: Remove unnecessary WARN_ON
  tools: PCI: Fix memory leak

 Documentation/PCI/endpoint/pci-test-howto.rst | 152 ++++++++--------
 drivers/misc/pci_endpoint_test.c              | 167 ++++++++----------
 tools/pci/pcitest.c                           |  48 ++---
 3 files changed, 179 insertions(+), 188 deletions(-)

-- 
2.25.1