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| author |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-01 18:37:34 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-05 13:01:34 +0200 |
| commit | 5666a274a6d54372d6b79b1f78682a9d827e679e (patch) | |
| tree | 7ce89c420972c5129c79d6d20d2c4038076c6ae9 /include/linux/debugfs.h | |
| parent | Revert "arch_topology: Make cluster topology span at least SMT CPUs" (diff) | |
| download | linux-dev-5666a274a6d54372d6b79b1f78682a9d827e679e.tar.xz linux-dev-5666a274a6d54372d6b79b1f78682a9d827e679e.zip | |
driver core: fix driver_set_override() issue with empty strings
Python likes to send an empty string for some sysfs files, including the
driver_override field. When commit 23d99baf9d72 ("PCI: Use
driver_set_override() instead of open-coding") moved the PCI core to use
the driver core function instead of hand-rolling their own handler, this
showed up as a regression from some userspace tools, like DPDK.
Fix this up by actually looking at the length of the string first
instead of trusting that userspace got it correct.
Fixes: 23d99baf9d72 ("PCI: Use driver_set_override() instead of open-coding")
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: stable <stable@kernel.org>
Reported-by: Stephen Hemminger <stephen@networkplumber.org>
Tested-by: Huisong Li <lihuisong@huawei.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220901163734.3583106-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions