From: Kishon Vijay Abraham I <kishon@ti.com>
To: Bjorn Helgaas <bhelgaas@google.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Murali Karicheri <m-karicheri2@ti.com>,
Jingoo Han <jingoohan1@gmail.com>,
Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc: Rob Herring <robh+dt@kernel.org>, <linux-pci@vger.kernel.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
Kishon Vijay Abraham I <kishon@ti.com>
Subject: [PATCH v2 04/21] PCI: keystone: Do not initiate link training multiple times
Date: Wed, 17 Oct 2018 13:10:57 +0530 [thread overview]
Message-ID: <20181017074114.28239-5-kishon@ti.com> (raw)
In-Reply-To: <20181017074114.28239-1-kishon@ti.com>
commit 886bc5ceb5cc3ad4b219502d72 ("PCI: designware: Add generic
dw_pcie_wait_for_link()") while adding a generic dw_pcie_wait_for_link()
performed a special handling (initiate link training multiple times) for
keystone which is not required. This also resulted in unncessarily waiting
for more time to establish the link even when no PCI device is connected.
Remove it and make it look similar to other dwc based PCIe drivers.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/controller/dwc/pci-keystone.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index afb948372077..aa7e706fc37d 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -87,19 +87,17 @@ static int ks_pcie_establish_link(struct keystone_pcie *ks_pcie)
{
struct dw_pcie *pci = ks_pcie->pci;
struct device *dev = pci->dev;
- unsigned int retries;
if (dw_pcie_link_up(pci)) {
dev_info(dev, "Link already up\n");
return 0;
}
+ ks_dw_pcie_initiate_link_train(ks_pcie);
+
/* check if the link is up or not */
- for (retries = 0; retries < 5; retries++) {
- ks_dw_pcie_initiate_link_train(ks_pcie);
- if (!dw_pcie_wait_for_link(pci))
- return 0;
- }
+ if (!dw_pcie_wait_for_link(pci))
+ return 0;
dev_err(dev, "phy link never came up\n");
return -ETIMEDOUT;
--
2.17.1
next prev parent reply other threads:[~2018-10-17 7:42 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-17 7:40 [PATCH v2 00/21] PCI: Cleanup pci-keystone driver Kishon Vijay Abraham I
2018-10-17 7:40 ` [PATCH v2 01/21] PCI: keystone: Use quirk to limit MRRS for K2G Kishon Vijay Abraham I
2018-10-17 7:40 ` [PATCH v2 02/21] PCI: keystone: Use quirk to set MRRS for PCI host bridge Kishon Vijay Abraham I
2018-10-17 7:40 ` [PATCH v2 03/21] PCI: keystone: Move dw_pcie_setup_rc out of ks_pcie_establish_link() Kishon Vijay Abraham I
2018-10-17 7:40 ` Kishon Vijay Abraham I [this message]
2018-10-17 7:40 ` [PATCH v2 05/21] PCI: keystone: Remove unused argument from ks_dw_pcie_host_init() Kishon Vijay Abraham I
2018-10-17 7:40 ` [PATCH v2 06/21] PCI: keystone: Merge pci-keystone-dw.c and pci-keystone.c Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 07/21] PCI: keystone: Remove redundant platform_set_drvdata Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 08/21] PCI: keystone: Use uniform function naming convention Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 09/21] dt-bindings: PCI: keystone: Add bindings to get device control module Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 10/21] PCI: keystone: Use SYSCON APIs to get device ID from " Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 11/21] PCI: keystone: Cleanup PHY handling Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 12/21] PCI: keystone: Invoke pm_runtime APIs to enable clock Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 13/21] PCI: keystone: Cleanup configuration space access Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 14/21] PCI: keystone: Get number of outbound windows from DT Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 15/21] PCI: keystone: Cleanup outbound window configuration Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 16/21] PCI: keystone: Cleanup set_dbi_mode and get_dbi_mode Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 17/21] PCI: keystone: Cleanup ks_pcie_link_up() Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 18/21] PCI: keystone: Use ERR_IRQ_STATUS instead of ERR_IRQ_STATUS_RAW to get interrupt status Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 19/21] PCI: keystone: Add debug error message for all errors Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 20/21] PCI: keystone: Reorder header file in alphabetical order Kishon Vijay Abraham I
2018-10-17 7:41 ` [PATCH v2 21/21] PCI: keystone: Cleanup macros defined in pci-keystone.c Kishon Vijay Abraham I
2018-10-17 11:12 ` [PATCH v2 00/21] PCI: Cleanup pci-keystone driver Lorenzo Pieralisi
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181017074114.28239-5-kishon@ti.com \
--to=kishon@ti.com \
--cc=bhelgaas@google.com \
--cc=devicetree@vger.kernel.org \
--cc=gustavo.pimentel@synopsys.com \
--cc=jingoohan1@gmail.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=lorenzo.pieralisi@arm.com \
--cc=m-karicheri2@ti.com \
--cc=robh+dt@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).