linux-kernel - RE: [PATCH v2 RESEND 02/23] bfa: Do not call pci_enable

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: <20B1A3CBD98F3845B3F5F56D8597EF59F827E4@avmb2.qlogic.org>
Date:	Wed, 16 Apr 2014 09:03:47 +0000
From:	Anil Gurumurthy <Anil.Gurumurthy@...gic.com>
To:	Alexander Gordeev <agordeev@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
CC:	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-pci <linux-pci@...r.kernel.org>
Subject: RE: [PATCH v2 RESEND 02/23] bfa: Do not call pci_enable_msix()
 after it failed once

Patch look good.
Acked-by: Anil Gurumurthy <anil.gurumurthy@...gic.com>

-----Original Message-----
From: linux-scsi-owner@...r.kernel.org [mailto:linux-scsi-owner@...r.kernel.org] On Behalf Of Alexander Gordeev
Sent: 14 April 2014 13:35
To: linux-kernel
Cc: Alexander Gordeev; Anil Gurumurthy; Vijaya Mohan Guvva; linux-scsi; linux-pci
Subject: [PATCH v2 RESEND 02/23] bfa: Do not call pci_enable_msix() after it failed once

Function pci_enable_msix() should not be called in case it threw a negative errno from a previous call.

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
Cc: Anil Gurumurthy <agurumur@...cade.com>
Cc: Vijaya Mohan Guvva <vmohan@...cade.com>
Cc: linux-scsi@...r.kernel.org
Cc: linux-pci@...r.kernel.org
Acked-by: Anil Gurumurthy <anil.gurumurthy@...gic.com>
---
 drivers/scsi/bfa/bfad.c |   48 ++++++++++++++++++++++------------------------
 1 files changed, 23 insertions(+), 25 deletions(-)

diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c index cc0fbcd..972ff8d 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -1235,33 +1235,31 @@ bfad_setup_intr(struct bfad_s *bfad)
           (bfa_asic_id_cb(pdev->device) && !msix_disable_cb)) {

                error = pci_enable_msix(bfad->pcidev, msix_entries, bfad->nvec);
-               if (error) {
-                       /* In CT1 & CT2, try to allocate just one vector */
-                       if (bfa_asic_id_ctc(pdev->device)) {
-                               printk(KERN_WARNING "bfa %s: trying one msix "
-                                      "vector failed to allocate %d[%d]\n",
-                                      bfad->pci_name, bfad->nvec, error);
-                               bfad->nvec = 1;
-                               error = pci_enable_msix(bfad->pcidev,
+               /* In CT1 & CT2, try to allocate just one vector */
+               if (error > 0 && bfa_asic_id_ctc(pdev->device)) {
+                       printk(KERN_WARNING "bfa %s: trying one msix "
+                              "vector failed to allocate %d[%d]\n",
+                              bfad->pci_name, bfad->nvec, error);
+                       bfad->nvec = 1;
+                       error = pci_enable_msix(bfad->pcidev,
                                                msix_entries, bfad->nvec);
-                       }
+               }

-                       /*
-                        * Only error number of vector is available.
-                        * We don't have a mechanism to map multiple
-                        * interrupts into one vector, so even if we
-                        * can try to request less vectors, we don't
-                        * know how to associate interrupt events to
-                        *  vectors. Linux doesn't duplicate vectors
-                        * in the MSIX table for this case.
-                        */
-                       if (error) {
-                               printk(KERN_WARNING "bfad%d: "
-                                      "pci_enable_msix failed (%d), "
-                                      "use line based.\n",
-                                       bfad->inst_no, error);
-                               goto line_based;
-                       }
+               /*
+                * Only error number of vector is available.
+                * We don't have a mechanism to map multiple
+                * interrupts into one vector, so even if we
+                * can try to request less vectors, we don't
+                * know how to associate interrupt events to
+                *  vectors. Linux doesn't duplicate vectors
+                * in the MSIX table for this case.
+                */
+               if (error) {
+                       printk(KERN_WARNING "bfad%d: "
+                              "pci_enable_msix failed (%d), "
+                              "use line based.\n",
+                               bfad->inst_no, error);
+                       goto line_based;
                }

                /* Disable INTX in MSI-X mode */
--
1.7.7.6

--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@...r.kernel.org More majordomo info at  http://vger.kernel.org/majordomo-info.html

________________________________

This message and any attached documents contain information from QLogic Corporation or its wholly-owned subsidiaries that may be confidential. If you are not the intended recipient, you may not read, copy, distribute, or use this information. If you have received this transmission in error, please notify the sender immediately by reply e-mail and then delete this message.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/