Subject: [PATCH] PCI: set resource to fixed for lsi devices
LSI cards do not work if pci core change pci bar vaules.
Set their resource to fixed, so will allow realloc to skip them.
Reported-by: Paul Johnson <pjay@nwtrail.com>
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=92351
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: stable@vger.kernel.org
---
drivers/pci/pci.h | 1 +
drivers/pci/quirks.c | 20 ++++++++++++++++++++
drivers/pci/setup-bus.c | 4 ++++
3 files changed, 25 insertions(+)
===================================================================
@@ -147,6 +147,7 @@ static inline void pci_msi_init_pci_dev(
#endif
void pci_realloc_get_opt(char *);
+bool pci_realloc_user_enabled(void);
static inline int pci_no_d1d2(struct pci_dev *dev)
{
===================================================================
@@ -324,6 +324,26 @@ static void quirk_s3_64M(struct pci_dev
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_868, quirk_s3_64M);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_968, quirk_s3_64M);
+/*
+ * LSI devices firmware does not like BAR get changed
+ */
+static void quirk_bar_fixed(struct pci_dev *dev)
+{
+ int i;
+
+ if (pci_realloc_user_enabled())
+ return;
+
+ for (i = 0; i < PCI_STD_RESOURCE_END; i++) {
+ struct resource *r = &dev->resource[i];
+
+ if (!r->flags || r->flags & IORESOURCE_UNSET)
+ continue;
+ r->flags |= IORESOURCE_PCI_FIXED;
+ }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_LSI_LOGIC, PCI_ANY_ID, quirk_bar_fixed);
+
static void quirk_io(struct pci_dev *dev, int pos, unsigned size,
const char *name)
{
===================================================================
@@ -1521,6 +1521,10 @@ void __init pci_realloc_get_opt(char *st
else if (!strncmp(str, "on", 2))
pci_realloc_enable = user_enabled;
}
+bool pci_realloc_user_enabled(void)
+{
+ return pci_realloc_enable == user_enabled;
+}
static bool pci_realloc_enabled(enum enable_type enable)
{
return enable >= user_enabled;