netdev - [PATCH net 4/8] bnxt_en: call pci_alloc_irq_vectors() after bnxt_reserve

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250428225903.1867675-5-michael.chan@broadcom.com>
Date: Mon, 28 Apr 2025 15:58:59 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	andrew+netdev@...n.ch,
	pavan.chebbi@...adcom.com,
	andrew.gospodarek@...adcom.com,
	Kashyap Desai <kashyap.desai@...adcom.com>
Subject: [PATCH net 4/8] bnxt_en: call pci_alloc_irq_vectors() after bnxt_reserve_rings()

From: Kashyap Desai <kashyap.desai@...adcom.com>

On some architectures (e.g. ARM), calling pci_alloc_irq_vectors()
will immediately cause the MSIX table to be written.  This will not
work if we haven't called bnxt_reserve_rings() to properly map
the MSIX table to the MSIX vectors reserved by FW.

Fix the FW error recovery path to delay the bnxt_init_int_mode() ->
pci_alloc_irq_vectors() call by removing it from bnxt_hwrm_if_change().
bnxt_request_irq() later in the code path will call it and by then the
MSIX table is properly mapped.

Fixes: 4343838ca5eb ("bnxt_en: Replace deprecated PCI MSIX APIs")
Suggested-by: Michael Chan <michael.chan@...adcom.com>
Signed-off-by: Kashyap Desai <kashyap.desai@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index cfc9ccab39bf..3b2ea36f25a2 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -12399,13 +12399,8 @@ static int bnxt_hwrm_if_change(struct bnxt *bp, bool up)
 				set_bit(BNXT_STATE_ABORT_ERR, &bp->state);
 				return rc;
 			}
+			/* IRQ will be initialized later in bnxt_request_irq()*/
 			bnxt_clear_int_mode(bp);
-			rc = bnxt_init_int_mode(bp);
-			if (rc) {
-				clear_bit(BNXT_STATE_FW_RESET_DET, &bp->state);
-				netdev_err(bp->dev, "init int mode failed\n");
-				return rc;
-			}
 		}
 		rc = bnxt_cancel_reservations(bp, fw_reset);
 	}
-- 
2.30.1