LSI HBA firmware stop responding pci read from host if pci core ever change pci device BAR values.
Set their resources to FIXED, so let realloc to skip them. v2: check if start is 0. Reported-by: Paul Johnson <p...@nwtrail.com> Suggested-by: Bjorn Helgaas <bhelg...@google.com> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=92351 Signed-off-by: Yinghai Lu <ying...@kernel.org> Cc: sta...@vger.kernel.org --- drivers/pci/pci.h | 1 + drivers/pci/quirks.c | 20 ++++++++++++++++++++ drivers/pci/setup-bus.c | 4 ++++ 3 files changed, 25 insertions(+) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 90e6e3e..0ac4229 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -170,6 +170,7 @@ static inline void pci_msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u } void pci_realloc_get_opt(char *); +bool pci_realloc_user_enabled(void); static inline int pci_no_d1d2(struct pci_dev *dev) { diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index d11af7f..a7cd617 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -335,6 +335,26 @@ static void quirk_s3_64M(struct pci_dev *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->start || !r->flags) + continue; + r->flags |= IORESOURCE_PCI_FIXED; + } +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_LSI_LOGIC, PCI_ANY_ID, quirk_bar_fixed); + /* for pci remove and rescan */ static void quirk_allocate_fixed(struct pci_dev *dev) { diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 815d2de..6385cf7 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -1677,6 +1677,10 @@ void __init pci_realloc_get_opt(char *str) 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; -- 1.8.4.5
