linux-kernel - [PATCH 04/12] PCI/switchtec: Remove redundant valid PFF number count

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Date:   Mon,  6 Jan 2020 12:03:29 -0700
From:   Logan Gunthorpe <logang@...tatee.com>
To:     linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     Kelvin.Cao@...rochip.com, Eric Pilmore <epilmore@...aio.com>,
        Doug Meyer <dmeyer@...aio.com>,
        Wesley Sheng <wesley.sheng@...rochip.com>,
        Logan Gunthorpe <logang@...tatee.com>
Subject: [PATCH 04/12] PCI/switchtec: Remove redundant valid PFF number count

From: Wesley Sheng <wesley.sheng@...rochip.com>

init_pff() function has already counted the valid PFF number, so there
is no requirement to count it again in ioctl_event_summary().

Signed-off-by: Wesley Sheng <wesley.sheng@...rochip.com>
Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
---
 drivers/pci/switch/switchtec.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index 218e67428cf9..231499da2899 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -683,11 +683,7 @@ static int ioctl_event_summary(struct switchtec_dev *stdev,
 		s->part[i] = reg;
 	}
 
-	for (i = 0; i < SWITCHTEC_MAX_PFF_CSR; i++) {
-		reg = ioread16(&stdev->mmio_pff_csr[i].vendor_id);
-		if (reg != PCI_VENDOR_ID_MICROSEMI)
-			break;
-
+	for (i = 0; i < stdev->pff_csr_count; i++) {
 		reg = ioread32(&stdev->mmio_pff_csr[i].pff_event_summary);
 		s->pff[i] = reg;
 	}
@@ -1327,16 +1323,16 @@ static void init_pff(struct switchtec_dev *stdev)
 	stdev->pff_csr_count = i;
 
 	reg = ioread32(&pcfg->usp_pff_inst_id);
-	if (reg < SWITCHTEC_MAX_PFF_CSR)
+	if (reg < stdev->pff_csr_count)
 		stdev->pff_local[reg] = 1;
 
 	reg = ioread32(&pcfg->vep_pff_inst_id);
-	if (reg < SWITCHTEC_MAX_PFF_CSR)
+	if (reg < stdev->pff_csr_count)
 		stdev->pff_local[reg] = 1;
 
 	for (i = 0; i < ARRAY_SIZE(pcfg->dsp_pff_inst_id); i++) {
 		reg = ioread32(&pcfg->dsp_pff_inst_id[i]);
-		if (reg < SWITCHTEC_MAX_PFF_CSR)
+		if (reg < stdev->pff_csr_count)
 			stdev->pff_local[reg] = 1;
 	}
 }
-- 
2.20.1