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authorNiklas Schnelle <schnelle@linux.ibm.com>2021-09-03 19:27:01 +0300
committerHeiko Carstens <hca@linux.ibm.com>2021-09-07 14:38:42 +0300
commitebd9cc6593691e6bc8526e368cedbdfc8034f403 (patch)
tree521f3c056897d525d259087b88c2576353e79edf /arch
parent19379d456f7b6d46e478cc1587a20d23f9d092ef (diff)
downloadlinux-ebd9cc6593691e6bc8526e368cedbdfc8034f403.tar.xz
s390/pci: fix clp_get_state() handling of -ENODEV
With commit cc049eecfb7a ("s390/pci: simplify CLP List PCI handling") clp_get_state() was changed to make use of the new clp_find_pci() helper function to query a specific function. This however returns -ENODEV when the device is not found at all and this error was passed to the caller. It was missed however that the callers actually expect a success return from clp_get_state() if the device is gone. Fix this by handling the -ENODEV return of clp_find_pci() explicitly in clp_get_state() returning success and setting the state parameter to ZPCI_FN_STATE_RESERVED matching the design concept that a PCI function that disappeared must have been resverved elsewhere. For all other error returns continue to just pass them on to the caller. Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com> Fixes: cc049eecfb7a ("s390/pci: simplify CLP List PCI handling") Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/pci/pci_clp.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c
index 51dc2215a2b7..df895d98a56b 100644
--- a/arch/s390/pci/pci_clp.c
+++ b/arch/s390/pci/pci_clp.c
@@ -449,14 +449,17 @@ int clp_get_state(u32 fid, enum zpci_state *state)
struct clp_fh_list_entry entry;
int rc;
- *state = ZPCI_FN_STATE_RESERVED;
rrb = clp_alloc_block(GFP_ATOMIC);
if (!rrb)
return -ENOMEM;
rc = clp_find_pci(rrb, fid, &entry);
- if (!rc)
+ if (!rc) {
*state = entry.config_state;
+ } else if (rc == -ENODEV) {
+ *state = ZPCI_FN_STATE_RESERVED;
+ rc = 0;
+ }
clp_free_block(rrb);
return rc;