The driver stores the the PCI resource address into 'u_long' variable before
calling ioremap_nocache() on it. This warrants kernel oops when the registers
are accessed on PPC 44x platforms which (being 32-bit) have PCI memory space
mapped beyond 4 GB.
The arch/ppc/ kernel has a fixup in ioremap() that creates an illusion of the
PCI I/O and memory resources are mapped below 4 GB, but arch/powerpc/ code got
rid of this trick, having instead CONFIG_RESOURCES_64BIT enabled.
Signed-off-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx>
---
I had to also change ahc_linux_pci_reserve_io_region() prototype because the
same 'base' variable is passed to it and ahc_linux_pci_reserve_mem_region(),
although 'u_long' is good for the I/O space addressed.
This is the same issue as the one that has been recently addressed by commits
3c34ac36ac1084e571ef9b6fb1d6a5b10ccc1fd0 (e1000: Fix for 32 bits platforms with
64 bits resources) and c976816b6e901341ec3c4653147316c15549a1c4 (siimage: fix
kernel oops on PPC 44x). The patch has only been compile tested though...
drivers/scsi/aic7xxx/aic7xxx_osm.h | 2 +-
drivers/scsi/aic7xxx/aic7xxx_osm_pci.c | 14 +++++++-------
2 files changed, 8 insertions(+), 8 deletions(-)
Index: linux-2.6/drivers/scsi/aic7xxx/aic7xxx_osm.h
===================================================================
--- linux-2.6.orig/drivers/scsi/aic7xxx/aic7xxx_osm.h
+++ linux-2.6/drivers/scsi/aic7xxx/aic7xxx_osm.h
@@ -365,7 +365,7 @@ struct ahc_platform_data {
#define AHC_LINUX_NOIRQ ((uint32_t)~0)
uint32_t irq; /* IRQ for this adapter */
uint32_t bios_address;
- uint32_t mem_busaddr; /* Mem Base Addr */
+ resource_size_t mem_busaddr; /* Mem Base Addr */
};
/************************** OS Utility Wrappers *******************************/
Index: linux-2.6/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
===================================================================
--- linux-2.6.orig/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
+++ linux-2.6/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
@@ -293,7 +293,7 @@ ahc_linux_pci_exit(void)
}
static int
-ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base)
+ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, resource_size_t *base)
{
if (aic7xxx_allow_memio == 0)
return (ENOMEM);
@@ -308,10 +308,10 @@ ahc_linux_pci_reserve_io_region(struct a
static int
ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
- u_long *bus_addr,
+ resource_size_t *bus_addr,
uint8_t __iomem **maddr)
{
- u_long start;
+ resource_size_t start;
int error;
error = 0;
@@ -336,7 +336,7 @@ int
ahc_pci_map_registers(struct ahc_softc *ahc)
{
uint32_t command;
- u_long base;
+ resource_size_t base;
uint8_t __iomem *maddr;
int error;
@@ -374,12 +374,12 @@ ahc_pci_map_registers(struct ahc_softc *
} else
command |= PCIM_CMD_MEMEN;
} else {
- printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
+ printf("aic7xxx: PCI%d:%d:%d MEM region 0x%llx "
"unavailable. Cannot memory map device.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc),
- base);
+ (uint64_t)base);
}
/*
@@ -398,7 +398,7 @@ ahc_pci_map_registers(struct ahc_softc *
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc),
- base);
+ (u_long)base);
}
}
ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
--
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