Subject: [PATCH] staging/rdma/hfi1: Fix for module parameter hdrq_entsize when it's 0

From: Mike Marciniszyn <[email-masked]>
Date: Thu, 10 Dec 2015 16:02:49 -0500

From: Sebastian Sanchez <[email-masked]>

If driver is loaded with parameter hdrq_entsize=0, then
there's a NULL dereference when the driver gets unloaded.
This causes a kernel Oops and prevents the module  from
being unloaded. This patch fixes this issue by making sure
-EINVAL gets returned when hdrq_entsize=0.

Reviewed-by: Chegondi, Harish <[email-masked]>
Reviewed-by: Haralanov, Mitko <[email-masked]>
Signed-off-by: Sebastian Sanchez <[email-masked]>
---
 drivers/staging/rdma/hfi1/init.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/rdma/hfi1/init.c b/drivers/staging/rdma/hfi1/init.c
index 1c8286f..b61a854 100644
--- a/drivers/staging/rdma/hfi1/init.c
+++ b/drivers/staging/rdma/hfi1/init.c
@@ -1350,6 +1350,7 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (!encode_rcv_header_entry_size(hfi1_hdrq_entsize)) {
 		hfi1_early_err(&pdev->dev, "Invalid HdrQ Entry size %u\n",
 			       hfi1_hdrq_entsize);
+		ret = -EINVAL;
 		goto bail;
 	}

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