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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>
This commit is contained in:
Roland Dreier 2006-12-15 14:01:49 -08:00
parent c59a3da134
commit bf628dc22a
2 changed files with 2 additions and 2 deletions
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2
drivers/infiniband/ulp/srp/ib_srp.c
View File

@ -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);

2
drivers/infiniband/ulp/srp/ib_srp.h
View File

@ -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 {