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s390/pci: Do not try re-enabling load/store if device is disabled

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If a device is disabled unblocking load/store on its own is not useful
as a full re-enable of the function is necessary anyway. Note that SCLP
Write Event Data Action Qualifier 0 (Reset) leaves the device disabled
and triggers this case unless the driver already requests a reset.

Cc: stable@vger.kernel.org
Fixes: 4cdf2f4e24 ("s390/pci: implement minimal PCI error recovery")
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Niklas Schnelle 2025-06-25 11:28:29 +02:00 committed by Alexander Gordeev
parent 45537926dd
commit b97a7972b1
1 changed files with 4 additions and 0 deletions
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4
arch/s390/pci/pci_event.c
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@ -106,6 +106,10 @@ static pci_ers_result_t zpci_event_do_error_state_clear(struct pci_dev *pdev,
struct zpci_dev *zdev = to_zpci(pdev);
int rc;
/* The underlying device may have been disabled by the event */
if (!zdev_enabled(zdev))
return PCI_ERS_RESULT_NEED_RESET;
pr_info("%s: Unblocking device access for examination\n", pci_name(pdev));
rc = zpci_reset_load_store_blocked(zdev);
if (rc) {