PCI: switchtec: Return -EFAULT for copy_to_user() errors

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[ Upstream commit ddc10938e0 ]

switchtec_dev_read() didn't handle copy_to_user() errors correctly: it
assigned "rc = -EFAULT", but actually returned either "size", -ENXIO, or
-EBADMSG instead.

Update the failure cases to unlock mrpc_mutex and return -EFAULT directly.

Link: https://lore.kernel.org/r/20221216162126.207863-3-helgaas@kernel.org
Fixes: 080b47def5 ("MicroSemi Switchtec management interface driver")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Bjorn Helgaas 2022-12-16 10:21:26 -06:00 • committed by Greg Kroah-Hartman

parent c3c277b7fd

commit ec4b595572

1 changed files with 4 additions and 5 deletions

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drivers/pci/switch/switchtec.c

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