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authorYijing Wang <wangyijing@huawei.com>2013-09-05 15:55:25 +0800
committerBjorn Helgaas <bhelgaas@google.com>2013-09-23 17:30:03 -0600
commitc0102c00d8c9f4109509d9d68631a1ad47703b5f (patch)
treeff3e9ce1eff09b5af990e73565949c7b4421d487 /drivers/scsi/bfa
parentf8a26fe637fc740ebb927ce25dcf036363a998df (diff)
downloadlinux-c0102c00d8c9f4109509d9d68631a1ad47703b5f.tar.bz2
[SCSI] bfa: Use pcie_set()/get_readrq() to simplify code
Use pcie_get_readrq()/pcie_set_readrq() to simplify code. Jon Mason proposed a similar patch a couple years ago (see below). [bhelgaas: validate pcie_max_read_reqsz, add pointer to Jon's patch] Reference: http://lkml.kernel.org/r/1309191190-14670-1-git-send-email-jdmason@kudzu.us Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Anil Gurumurthy <agurumur@brocade.com> Cc: Vijaya Mohan Guvva <vmohan@brocade.com> Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Diffstat (limited to 'drivers/scsi/bfa')
-rw-r--r--drivers/scsi/bfa/bfad.c53
1 files changed, 12 insertions, 41 deletions
diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c
index f8ca7becacca..7591fa4e28bb 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -766,49 +766,20 @@ bfad_pci_init(struct pci_dev *pdev, struct bfad_s *bfad)
bfad->pcidev = pdev;
/* Adjust PCIe Maximum Read Request Size */
- if (pcie_max_read_reqsz > 0) {
- int pcie_cap_reg;
- u16 pcie_dev_ctl;
- u16 mask = 0xffff;
-
- switch (pcie_max_read_reqsz) {
- case 128:
- mask = 0x0;
- break;
- case 256:
- mask = 0x1000;
- break;
- case 512:
- mask = 0x2000;
- break;
- case 1024:
- mask = 0x3000;
- break;
- case 2048:
- mask = 0x4000;
- break;
- case 4096:
- mask = 0x5000;
- break;
- default:
- break;
- }
-
- pcie_cap_reg = pci_find_capability(pdev, PCI_CAP_ID_EXP);
- if (mask != 0xffff && pcie_cap_reg) {
- pcie_cap_reg += 0x08;
- pci_read_config_word(pdev, pcie_cap_reg, &pcie_dev_ctl);
- if ((pcie_dev_ctl & 0x7000) != mask) {
- printk(KERN_WARNING "BFA[%s]: "
+ if (pci_is_pcie(pdev) && pcie_max_read_reqsz) {
+ if (pcie_max_read_reqsz >= 128 &&
+ pcie_max_read_reqsz <= 4096 &&
+ is_power_of_2(pcie_max_read_reqsz)) {
+ int max_rq = pcie_get_readrq(pdev);
+ printk(KERN_WARNING "BFA[%s]: "
"pcie_max_read_request_size is %d, "
- "reset to %d\n", bfad->pci_name,
- (1 << ((pcie_dev_ctl & 0x7000) >> 12)) << 7,
+ "reset to %d\n", bfad->pci_name, max_rq,
pcie_max_read_reqsz);
-
- pcie_dev_ctl &= ~0x7000;
- pci_write_config_word(pdev, pcie_cap_reg,
- pcie_dev_ctl | mask);
- }
+ pcie_set_readrq(pdev, pcie_max_read_reqsz);
+ } else {
+ printk(KERN_WARNING "BFA[%s]: invalid "
+ "pcie_max_read_request_size %d ignored\n",
+ bfad->pci_name, pcie_max_read_reqsz);
}
}