iSCSI/iBFT: use proper address translation

In virtual environments (namely, Xen Dom0) virt <-> phys and
virt <-> isa-bus translations cannot be freely interchanged (and
even outside such environments it is not really correct to do so).
When looking at memory below 1M, the latter translations should
always be used.

iscsi_ibft_find.c part from: Martin Wilck <martin.wilck@ts.fujitsu.com>.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Konrad Rzeszutek Wilk <ketuzsezs@darnok.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c
index 420a96e7f2dbb1a31d299f70daa07f22e8b95db3..051d1ebbd2876b68db9df2209161b13da7e8d7bb 100644 (file)
--- a/drivers/firmware/iscsi_ibft.c
+++ b/drivers/firmware/iscsi_ibft.c
@@ -939,7 +939,7 @@ static int __init ibft_init(void)
 
        if (ibft_addr) {
                printk(KERN_INFO "iBFT detected at 0x%llx.\n",
-                      (u64)virt_to_phys((void *)ibft_addr));
+                      (u64)isa_virt_to_bus(ibft_addr));
 
                rc = ibft_check_device();
                if (rc)

diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
index d53fbbfefa3ee2893ece684f2a5cb25eddf77b04..dfb15c06c88ff8482de2b03164679633748848b7 100644 (file)
--- a/drivers/firmware/iscsi_ibft_find.c
+++ b/drivers/firmware/iscsi_ibft_find.c
@@ -65,10 +65,10 @@ void __init reserve_ibft_region(void)
                 * so skip that area */
                if (pos == VGA_MEM)
                        pos += VGA_SIZE;
-               virt = phys_to_virt(pos);
+               virt = isa_bus_to_virt(pos);
                if (memcmp(virt, IBFT_SIGN, IBFT_SIGN_LEN) == 0) {
                        unsigned long *addr =
-                           (unsigned long *)phys_to_virt(pos + 4);
+                           (unsigned long *)isa_bus_to_virt(pos + 4);
                        len = *addr;
                        /* if the length of the table extends past 1M,
                         * the table cannot be valid. */