xprtrdma: Prevent infinite loop in rpcrdma_ep_create()

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[ Upstream commit 41f9702896 ]

If a provider advertizes a zero max_fast_reg_page_list_len, FRWR
depth detection loops forever. Instead of just failing the mount,
try other memory registration modes.

Fixes: 0fc6c4e7bb ("xprtrdma: mind the device's max fast . . .")
Reported-by: Devesh Sharma <Devesh.Sharma@Emulex.Com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Devesh Sharma <Devesh.Sharma@Emulex.Com>
Tested-by: Meghana Cheripady <Meghana.Cheripady@Emulex.Com>
Tested-by: Veeresh U. Kokatnur <veereshuk@chelsio.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

...

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Chuck Lever 2015-03-30 14:34:12 -04:00 • committed by Sasha Levin

parent 1b681a5e19

commit 20cf09ef67

1 changed files with 3 additions and 2 deletions

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net/sunrpc/xprtrdma/verbs.c

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