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-rw-r--r--drivers/char/ipmi/ipmi_si_intf.c40
1 files changed, 27 insertions, 13 deletions
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 8d984f9..7b1c412 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -1637,25 +1637,28 @@ static void mem_outq(const struct si_sm_io *io, unsigned int offset,
}
#endif
-static void mem_cleanup(struct smi_info *info)
+static void mem_region_cleanup(struct smi_info *info, int num)
{
unsigned long addr = info->io.addr_data;
- int mapsize;
+ int idx;
+
+ for (idx = 0; idx < num; idx++)
+ release_mem_region(addr + idx * info->io.regspacing,
+ info->io.regsize);
+}
+static void mem_cleanup(struct smi_info *info)
+{
if (info->io.addr) {
iounmap(info->io.addr);
-
- mapsize = ((info->io_size * info->io.regspacing)
- - (info->io.regspacing - info->io.regsize));
-
- release_mem_region(addr, mapsize);
+ mem_region_cleanup(info, info->io_size);
}
}
static int mem_setup(struct smi_info *info)
{
unsigned long addr = info->io.addr_data;
- int mapsize;
+ int mapsize, idx;
if (!addr)
return -ENODEV;
@@ -1692,6 +1695,21 @@ static int mem_setup(struct smi_info *info)
}
/*
+ * Some BIOSes reserve disjoint memory regions in their ACPI
+ * tables. This causes problems when trying to request the
+ * entire region. Therefore we must request each register
+ * separately.
+ */
+ for (idx = 0; idx < info->io_size; idx++) {
+ if (request_mem_region(addr + idx * info->io.regspacing,
+ info->io.regsize, DEVICE_NAME) == NULL) {
+ /* Undo allocations */
+ mem_region_cleanup(info, idx);
+ return -EIO;
+ }
+ }
+
+ /*
* Calculate the total amount of memory to claim. This is an
* unusual looking calculation, but it avoids claiming any
* more memory than it has to. It will claim everything
@@ -1700,13 +1718,9 @@ static int mem_setup(struct smi_info *info)
*/
mapsize = ((info->io_size * info->io.regspacing)
- (info->io.regspacing - info->io.regsize));
-
- if (request_mem_region(addr, mapsize, DEVICE_NAME) == NULL)
- return -EIO;
-
info->io.addr = ioremap(addr, mapsize);
if (info->io.addr == NULL) {
- release_mem_region(addr, mapsize);
+ mem_region_cleanup(info, info->io_size);
return -EIO;
}
return 0;
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