linux-kernel - [PATCH] pciehp: Remove the field controller->no_cmd

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Message-ID: <5397E8FD.1070905@gmail.com>
Date:	Tue, 10 Jun 2014 22:28:29 -0700
From:	Rajat Jain <rajatxjain@...il.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
CC:	Guenter Roeck <groeck@...iper.net>,
	Rajat Jain <rajatjain@...iper.net>
Subject: [PATCH] pciehp: Remove the field controller->no_cmd_completed

After following recent cleanups by Bjorn:

http://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/log/?h=pci/hotplug

2cc56f3 PCI: pciehp: Remove assumptions about which commands cause
40b9608 PCI: pciehp: Compute timeout from hotplug command start time
3461a06 PCI: pciehp: Wait for hotplug command completion lazily
4283c70 PCI: pciehp: Make pcie_wait_cmd() self-contained

the bitfield no_cmd_complete is not really needed anymore, as there is
only a single occurance of its use. Hence remove the unnecessary bit
field, and use existing macro NO_CMD_CMPL() instead.

Signed-off-by: Rajat Jain <rajatxjain@...il.com>
Signed-off-by: Rajat Jain <rajatjain@...iper.net>
Signed-off-by: Guenter Roeck <groeck@...iper.net>
---
(This is rebased on top of Bjorn's pci/hotplug branch mentioned above)

 drivers/pci/hotplug/pciehp.h     |    1 -
 drivers/pci/hotplug/pciehp_hpc.c |   11 +----------
 2 files changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index c496258..9e5a9fb 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -96,7 +96,6 @@ struct controller {
 	struct timer_list poll_timer;
 	unsigned long cmd_started;	/* jiffies */
 	unsigned int cmd_busy:1;
-	unsigned int no_cmd_complete:1;
 	unsigned int link_active_reporting:1;
 	unsigned int notification_enabled:1;
 	unsigned int power_fault_detected;
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index a3a5c65..f7c3709 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -140,7 +140,7 @@ static void pcie_wait_cmd(struct controller *ctrl)
 	 * If the controller does not generate notifications for command
 	 * completions, we never need to wait between writes.
 	 */
-	if (ctrl->no_cmd_complete)
+	if (NO_CMD_CMPL(ctrl))
 		return;
 
 	if (!ctrl->cmd_busy)
@@ -772,15 +772,6 @@ struct controller *pcie_init(struct pcie_device *dev)
 	init_waitqueue_head(&ctrl->queue);
 	dbg_ctrl(ctrl);
 
-	/*
-	 * Controller doesn't notify of command completion if the "No
-	 * Command Completed Support" bit is set in Slot Capabilities.
-	 * If set, it means the controller can accept hotplug commands
-	 * with no delay between them.
-	 */
-	if (NO_CMD_CMPL(ctrl))
-		ctrl->no_cmd_complete = 1;
-
 	/* Check if Data Link Layer Link Active Reporting is implemented */
 	pcie_capability_read_dword(pdev, PCI_EXP_LNKCAP, &link_cap);
 	if (link_cap & PCI_EXP_LNKCAP_DLLLARC) {
-- 
1.7.9.5

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