ehea: 64K page kernel support fix

based on 2c69448bbcedebeb8409ddb05fbc7d3fe1cfbda7 in mainline.

The current eHEA module compiled for 64K page kernels can not
be loaded with insmod due to bad hypervisor call parameters.
The patch is a subset of the follwing patch which has been applied
for 2.6.24 upstream:

http://www.spinics.net/lists/netdev/msg42814.html

Signed-off-by: Jan-Bernd Themann <themann@de.ibm.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/net/ehea/ehea_qmr.c b/drivers/net/ehea/ehea_qmr.c
index c82e245960746ed2f126a4f4b78d77ec30eba3bc..329a25248d75c13aa7a6d5ca348675dd6c08bddc 100644 (file)
--- a/drivers/net/ehea/ehea_qmr.c
+++ b/drivers/net/ehea/ehea_qmr.c
@@ -563,8 +563,7 @@ int ehea_destroy_qp(struct ehea_qp *qp)
 int ehea_create_busmap( void )
 {
        u64 vaddr = EHEA_BUSMAP_START;
-       unsigned long abs_max_pfn = 0;
-       unsigned long sec_max_pfn;
+       unsigned long high_section_index = 0;
        int i;
 
        /*
@@ -574,14 +573,10 @@ int ehea_create_busmap( void )
        ehea_bmap.valid_sections = 0;
 
        for (i = 0; i < NR_MEM_SECTIONS; i++)
-               if (valid_section_nr(i)) {
-                       sec_max_pfn = section_nr_to_pfn(i);
-                       if (sec_max_pfn > abs_max_pfn)
-                               abs_max_pfn = sec_max_pfn;
-                       ehea_bmap.valid_sections++;
-               }
+               if (valid_section_nr(i))
+                       high_section_index = i;
 
-       ehea_bmap.entries = abs_max_pfn / EHEA_PAGES_PER_SECTION + 1;
+       ehea_bmap.entries = high_section_index + 1;
        ehea_bmap.vaddr = vmalloc(ehea_bmap.entries * sizeof(*ehea_bmap.vaddr));
 
        if (!ehea_bmap.vaddr)
@@ -593,6 +588,7 @@ int ehea_create_busmap( void )
                if (pfn_valid(pfn)) {
                        ehea_bmap.vaddr[i] = vaddr;
                        vaddr += EHEA_SECTSIZE;
+                       ehea_bmap.valid_sections++;
                } else
                        ehea_bmap.vaddr[i] = 0;
        }
@@ -637,7 +633,7 @@ int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
 
        mr_len = ehea_bmap.valid_sections * EHEA_SECTSIZE;
 
-       pt =  kzalloc(EHEA_MAX_RPAGE * sizeof(u64), GFP_KERNEL);
+       pt =  kzalloc(PAGE_SIZE, GFP_KERNEL);
        if (!pt) {
                ehea_error("no mem");
                ret = -ENOMEM;
@@ -660,8 +656,8 @@ int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
                        void *sectbase = __va(i << SECTION_SIZE_BITS);
                        unsigned long k = 0;
 
-                       for (j = 0; j < (PAGES_PER_SECTION / EHEA_MAX_RPAGE);
-                             j++) {
+                       for (j = 0; j < (EHEA_PAGES_PER_SECTION /
+                                        EHEA_MAX_RPAGE); j++) {
 
                                for (m = 0; m < EHEA_MAX_RPAGE; m++) {
                                        pg = sectbase + ((k++) * EHEA_PAGESIZE);

diff --git a/drivers/net/ehea/ehea_qmr.h b/drivers/net/ehea/ehea_qmr.h
index b71f8452a5e36be88a5c1d4283695f4cfec1a261..352cb3858527c16a04aaca93d3efdfaf95b75e53 100644 (file)
--- a/drivers/net/ehea/ehea_qmr.h
+++ b/drivers/net/ehea/ehea_qmr.h
@@ -39,7 +39,7 @@
 #define EHEA_PAGESHIFT         12
 #define EHEA_PAGESIZE          (1UL << EHEA_PAGESHIFT)
 #define EHEA_SECTSIZE          (1UL << 24)
-#define EHEA_PAGES_PER_SECTION (EHEA_SECTSIZE >> PAGE_SHIFT)
+#define EHEA_PAGES_PER_SECTION (EHEA_SECTSIZE >> EHEA_PAGESHIFT)
 
 #if (1UL << SECTION_SIZE_BITS) < EHEA_SECTSIZE
 #error eHEA module can't work if kernel sectionsize < ehea sectionsize