diff mbox series

[v3,07/11] PCI: MSI: Use never-managed version of pci_intx()

Message ID 20241209130632.132074-9-pstanner@redhat.com (mailing list archive)
State Not Applicable
Headers show
Series Remove implicit devres from pci_intx() | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Guessed tree name to be net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1 this patch: 1
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 16 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 5 this patch: 5
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-12-09--18-00 (tests: 760)

Commit Message

Philipp Stanner Dec. 9, 2024, 1:06 p.m. UTC 
pci_intx() is a hybrid function which can sometimes be managed through
devres. To remove this hybrid nature from pci_intx(), it is necessary to
port users to either an always-managed or a never-managed version.

MSI sets up its own separate devres callback implicitly in
pcim_setup_msi_release(). This callback ultimately uses pci_intx(),
which is problematic since the callback of course runs on driver-detach.

That problem has last been described here:
https://lore.kernel.org/all/ee44ea7ac760e73edad3f20b30b4d2fff66c1a85.camel@redhat.com/

Replace the call to pci_intx() with one to the never-managed version
pci_intx_unmanaged().

Signed-off-by: Philipp Stanner <pstanner@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
---
 drivers/pci/msi/api.c | 2 +-
 drivers/pci/msi/msi.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/pci/msi/api.c b/drivers/pci/msi/api.c
index b956ce591f96..c95e2e7dc9ab 100644
--- a/drivers/pci/msi/api.c
+++ b/drivers/pci/msi/api.c
@@ -289,7 +289,7 @@  int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
 			 */
 			if (affd)
 				irq_create_affinity_masks(1, affd);
-			pci_intx(dev, 1);
+			pci_intx_unmanaged(dev, 1);
 			return 1;
 		}
 	}
diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c
index 3a45879d85db..53f13b09db50 100644
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -268,7 +268,7 @@  EXPORT_SYMBOL_GPL(pci_write_msi_msg);
 static void pci_intx_for_msi(struct pci_dev *dev, int enable)
 {
 	if (!(dev->dev_flags & PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG))
-		pci_intx(dev, enable);
+		pci_intx_unmanaged(dev, enable);
 }
 
 static void pci_msi_set_enable(struct pci_dev *dev, int enable)