[PATCH 5.9 50/74] net/smc: fix suppressed return code

Greg Kroah-Hartman
2020-10-31T11:47:46Z

From: Karsten Graul <kgraul@linux.ibm.com>

[ Upstream commit 96d6fded958d971a3695009e0ed43aca6c598283 ]

The patch that repaired the invalid return code in smcd_new_buf_create()
missed to take care of errno ENOSPC which has a special meaning that no
more DMBEs can be registered on the device. Fix that by keeping this
errno value during the translation of the return code.

Fixes: 6b1bbf94ab36 ("net/smc: fix invalid return code in smcd_new_buf_create()")
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>
---
net/smc/smc_core.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -1616,8 +1616,11 @@ static struct smc_buf_desc *smcd_new_buf
rc = smc_ism_register_dmb(lgr, bufsize, buf_desc);
if (rc) {
kfree(buf_desc);
- return (rc == -ENOMEM) ? ERR_PTR(-EAGAIN) :
- ERR_PTR(-EIO);
+ if (rc == -ENOMEM)
+ return ERR_PTR(-EAGAIN);
+ if (rc == -ENOSPC)
+ return ERR_PTR(-ENOSPC);
+ return ERR_PTR(-EIO);
}
buf_desc->pages = virt_to_page(buf_desc->cpu_addr);
/* CDC header stored in buf. So, pretend it was smaller */