s390/pci: fix misleading rc in clp_set_pci_fn()

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Currently clp_set_pci_fn() always returns 0 as long as the CLP request
itself succeeds even if the operation itself returns a response code
other than CLP_RC_OK or CLP_RC_SETPCIFN_ALRDY. This is highly misleading
because calling code assumes that a zero rc means that the operation was
successful.

Fix this by returning the response code or cc on failure with the
exception of the special handling for CLP_RC_SETPCIFN_ALRDY. Also let's
not assume that the returned function handle for CLP_RC_SETPCIFN_ALRDY
is 0, we don't need it anyway.

Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

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This commit is contained in:

Niklas Schnelle 2021-07-21 19:58:54 +02:00 • committed by Heiko Carstens

parent e8f06683d4

commit f7addcdd52

2 changed files with 20 additions and 20 deletions

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7

arch/s390/pci/pci.c

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33

arch/s390/pci/pci_clp.c

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