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authorLogan Gunthorpe2016-06-07 11:20:22 -0600
committerJon Mason2016-08-05 10:21:06 -0400
commit19645a077120c6417e9dc5ad469c45194cf78a82 (patch)
tree41676f4b27a17fb9b75ba47b33f0bdf6756adcf6 /drivers/ntb/test
parent8b71d285061181f91194114cc7dabce73185eed1 (diff)
ntb_transport: Check the number of spads the hardware supports
I'm working on hardware that currently has a limited number of scratchpad registers and ntb_ndev fails with no clue as to why. I feel it is better to fail early and provide a reasonable error message then to fail later on. The same is done to ntb_perf, but it doesn't currently require enough spads to actually fail. I've also removed the unused SPAD_MSG and SPAD_ACK enums so that MAX_SPAD accurately reflects the number of spads used. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'drivers/ntb/test')
-rw-r--r--drivers/ntb/test/ntb_perf.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c
index 30635c89320c..4368519da102 100644
--- a/drivers/ntb/test/ntb_perf.c
+++ b/drivers/ntb/test/ntb_perf.c
@@ -143,8 +143,6 @@ enum {
VERSION = 0,
MW_SZ_HIGH,
MW_SZ_LOW,
- SPAD_MSG,
- SPAD_ACK,
MAX_SPAD
};
@@ -696,6 +694,12 @@ static int perf_probe(struct ntb_client *client, struct ntb_dev *ntb)
int node;
int rc = 0;
+ if (ntb_spad_count(ntb) < MAX_SPAD) {
+ dev_err(&ntb->dev, "Not enough scratch pad registers for %s",
+ DRIVER_NAME);
+ return -EIO;
+ }
+
node = dev_to_node(&pdev->dev);
perf = kzalloc_node(sizeof(*perf), GFP_KERNEL, node);