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authorRoland Dreier <rolandd@cisco.com>2006-12-16 01:01:49 +0300
committerRoland Dreier <rolandd@cisco.com>2006-12-16 01:01:49 +0300
commitbf628dc22a09ed2022abb32c76011ae5f99ad6b0 (patch)
treec29aff97085d9426dffe1e648e09d4aca0ead024 /drivers/infiniband
parentc59a3da1342ff456e5123361739bc331446cda21 (diff)
downloadlinux-bf628dc22a09ed2022abb32c76011ae5f99ad6b0.tar.xz
IB/srp: Fix FMR mapping for 32-bit kernels and addresses above 4G
struct srp_device.fmr_page_mask was unsigned long, which means that the top part of addresses above 4G was being chopped off on 32-bit architectures. Of course nothing good happens when data from SRP targets is DMAed to the wrong place. Fix this by changing fmr_page_mask to u64, to match the addresses actually used by IB devices. Thanks to Brian Cain <Brian.Cain@ge.com> and David McMillen <davem@systemfabricworks.com> for help diagnosing the bug and testing the fix. Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/ulp/srp/ib_srp.c2
-rw-r--r--drivers/infiniband/ulp/srp/ib_srp.h2
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index e9b6a6f07dd7..cdecbf5911c8 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1898,7 +1898,7 @@ static void srp_add_one(struct ib_device *device)
*/
srp_dev->fmr_page_shift = max(9, ffs(dev_attr->page_size_cap) - 1);
srp_dev->fmr_page_size = 1 << srp_dev->fmr_page_shift;
- srp_dev->fmr_page_mask = ~((unsigned long) srp_dev->fmr_page_size - 1);
+ srp_dev->fmr_page_mask = ~((u64) srp_dev->fmr_page_size - 1);
INIT_LIST_HEAD(&srp_dev->dev_list);
diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h
index 868a540ef7cd..c21772317b86 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.h
+++ b/drivers/infiniband/ulp/srp/ib_srp.h
@@ -87,7 +87,7 @@ struct srp_device {
struct ib_fmr_pool *fmr_pool;
int fmr_page_shift;
int fmr_page_size;
- unsigned long fmr_page_mask;
+ u64 fmr_page_mask;
};
struct srp_host {