IB/srp: fix invalid indirect_sg_entries parameter value
authorIsrael Rukshin <israelr@mellanox.com>
Wed, 4 Jan 2017 13:59:37 +0000 (15:59 +0200)
committerDoug Ledford <dledford@redhat.com>
Tue, 24 Jan 2017 16:30:14 +0000 (11:30 -0500)
commit0a475ef4226e305bdcffe12b401ca1eab06c4913
tree33ebdae1128d56463839b10ad499dd14d59df48e
parentad8e66b4a80182174f73487ed25fd2140cf43361
IB/srp: fix invalid indirect_sg_entries parameter value

After setting indirect_sg_entries module_param to huge value (e.g 500,000),
srp_alloc_req_data() fails to allocate indirect descriptors for the request
ring (kmalloc fails). This commit enforces the maximum value of
indirect_sg_entries to be SG_MAX_SEGMENTS as signified in module param
description.

Fixes: 65e8617fba17 (scsi: rename SCSI_MAX_{SG, SG_CHAIN}_SEGMENTS)
Fixes: c07d424d6118 (IB/srp: add support for indirect tables that don't fit in SRP_CMD)
Cc: stable@vger.kernel.org # 4.7+
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>--
Signed-off-by: Doug Ledford <dledford@redhat.com>
drivers/infiniband/ulp/srp/ib_srp.c