net/smc: fix valid DMBE buffer sizes

[ Upstream commit ef12ad45880b696eb993d86c481ca891836ab593 ]

The SMCD_DMBE_SIZES should include all valid DMBE buffer sizes, so the
correct value is 6 which means 1MB. With 7 the registration of an ISM
buffer would always fail because of the invalid size requested.
Fix that and set the value to 6.

Fixes: c6ba7c9ba43d ("net/smc: add base infrastructure for SMC-D and ISM")
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index 0c5fcb8ed404dfaf7c5b523cc52ca45b64f94b0c..aeea67f9084158cd1c75bd2bf642ea4d7cd68cc2 100644 (file)
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -795,7 +795,7 @@ static struct smc_buf_desc *smcr_new_buf_create(struct smc_link_group *lgr,
        return buf_desc;
 }
 
-#define SMCD_DMBE_SIZES                7 /* 0 -> 16KB, 1 -> 32KB, .. 6 -> 1MB */
+#define SMCD_DMBE_SIZES                6 /* 0 -> 16KB, 1 -> 32KB, .. 6 -> 1MB */
 
 static struct smc_buf_desc *smcd_new_buf_create(struct smc_link_group *lgr,
                                                bool is_dmb, int bufsize)