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cxgb4: allow large buffer size to have page size

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Since commit 52367a763d
("cxgb4/cxgb4vf: Code cleanup to enable T4 Configuration File support"),
we have failures like this during cxgb4 probe:

cxgb4 0000:01:00.4: bad SGE FL page buffer sizes [65536, 65536]
cxgb4: probe of 0000:01:00.4 failed with error -22

This happens whenever software parameters are used, without a
configuration file. That happens when the hardware was already
initialized (after kexec, or after csiostor is loaded).

It happens that these values are acceptable, rendering fl_pg_order equal
to 0, which is the case of a hard init when the page size is equal or
larger than 65536.

Accepting fl_large_pg equal to fl_small_pg solves the issue, and
shouldn't cause any trouble besides a possible performance reduction
when smaller pages are used. And that can be fixed by a configuration
file.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thadeu Lima de Souza Cascardo 2013-12-23 15:34:29 -02:00 committed by David S. Miller
parent aca5f58f9b
commit 940d9d34a5
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/chelsio/cxgb4/sge.c
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@ -2581,7 +2581,7 @@ static int t4_sge_init_soft(struct adapter *adap)
#undef READ_FL_BUF
if (fl_small_pg != PAGE_SIZE ||
(fl_large_pg != 0 && (fl_large_pg <= fl_small_pg ||
(fl_large_pg != 0 && (fl_large_pg < fl_small_pg ||
(fl_large_pg & (fl_large_pg-1)) != 0))) {
dev_err(adap->pdev_dev, "bad SGE FL page buffer sizes [%d, %d]\n",
fl_small_pg, fl_large_pg);