linux-kernel - [PATCH 4.19 19/24] Revert "be2net: remove desc field from be_eq

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Message-Id: <20181102182842.695383897@linuxfoundation.org>
Date:   Fri,  2 Nov 2018 19:34:52 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ivan Vecera <ivecera@...hat.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.19 19/24] Revert "be2net: remove desc field from be_eq_obj"

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ivan Vecera <ivecera@...hat.com>

[ Upstream commit 5ef79151c2fbc401cf38325e9a32e77b9fc593ae ]

The mentioned commit needs to be reverted because we cannot pass
string allocated on stack to request_irq(). This function stores
uses this pointer for later use (e.g. /proc/interrupts) so we need
to keep this string persistently.

Fixes: d6d9704af8f4 ("be2net: remove desc field from be_eq_obj")
Signed-off-by: Ivan Vecera <ivecera@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/emulex/benet/be.h      |    1 +
 drivers/net/ethernet/emulex/benet/be_main.c |    6 ++----
 2 files changed, 3 insertions(+), 4 deletions(-)

--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -185,6 +185,7 @@ static inline void queue_tail_inc(struct
 
 struct be_eq_obj {
 	struct be_queue_info q;
+	char desc[32];
 
 	struct be_adapter *adapter;
 	struct napi_struct napi;
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -3488,11 +3488,9 @@ static int be_msix_register(struct be_ad
 	int status, i, vec;
 
 	for_all_evt_queues(adapter, eqo, i) {
-		char irq_name[IFNAMSIZ+4];
-
-		snprintf(irq_name, sizeof(irq_name), "%s-q%d", netdev->name, i);
+		sprintf(eqo->desc, "%s-q%d", netdev->name, i);
 		vec = be_msix_vec_get(adapter, eqo);
-		status = request_irq(vec, be_msix, 0, irq_name, eqo);
+		status = request_irq(vec, be_msix, 0, eqo->desc, eqo);
 		if (status)
 			goto err_msix;