Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755711AbZDVHIz (ORCPT ); Wed, 22 Apr 2009 03:08:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753844AbZDVHHk (ORCPT ); Wed, 22 Apr 2009 03:07:40 -0400 Received: from smtp.wellnetcz.com ([212.24.148.102]:43925 "EHLO smtp.wellnetcz.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752854AbZDVHHh (ORCPT ); Wed, 22 Apr 2009 03:07:37 -0400 From: Jiri Slaby To: akpm@linux-foundation.org Cc: alan@lxorguk.ukuu.org.uk, linux-kernel@vger.kernel.org, Jiri Slaby Subject: [PATCH 5/6] Char: cyclades, fix nports handling Date: Wed, 22 Apr 2009 09:06:42 +0200 Message-Id: <1240384003-25499-5-git-send-email-jirislaby@gmail.com> X-Mailer: git-send-email 1.6.2.3 In-Reply-To: <1240384003-25499-1-git-send-email-jirislaby@gmail.com> References: <1240384003-25499-1-git-send-email-jirislaby@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7059 Lines: 208 Set up ports right after FW load so that we won't allocate maximal (64) ports when we use few. Also remove reading of nports in irq context, since we know it from initialisation now. This also fixes a tty ports unregistration on some fail paths and for Ze which registered 64 and unregistered real port count. Signed-off-by: Jiri Slaby --- drivers/char/cyclades.c | 58 +++++++++++++--------------------------------- 1 files changed, 17 insertions(+), 41 deletions(-) diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c index c9a503f..6adbc97 100644 --- a/drivers/char/cyclades.c +++ b/drivers/char/cyclades.c @@ -604,7 +604,6 @@ #define NR_PORTS 256 -#define ZE_V1_NPORTS 64 #define ZO_V1 0 #define ZO_V2 1 #define ZE_V1 2 @@ -1777,7 +1776,6 @@ static void cyz_poll(unsigned long arg) struct tty_struct *tty; struct FIRM_ID __iomem *firm_id; struct ZFW_CTRL __iomem *zfw_ctrl; - struct BOARD_CTRL __iomem *board_ctrl; struct BUF_CTRL __iomem *buf_ctrl; unsigned long expires = jiffies + HZ; unsigned int port, card; @@ -1793,11 +1791,9 @@ static void cyz_poll(unsigned long arg) firm_id = cinfo->base_addr + ID_ADDRESS; zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); - board_ctrl = &(zfw_ctrl->board_ctrl); /* Skip first polling cycle to avoid racing conditions with the FW */ if (!cinfo->intr_enabled) { - cinfo->nports = (int)readl(&board_ctrl->n_channel); cinfo->intr_enabled = 1; continue; } @@ -2413,16 +2409,8 @@ static int cy_open(struct tty_struct *tty, struct file *filp) interrupts should be enabled as soon as the first open happens to one of its ports. */ if (!cinfo->intr_enabled) { - struct ZFW_CTRL __iomem *zfw_ctrl; - struct BOARD_CTRL __iomem *board_ctrl; u16 intr; - zfw_ctrl = cinfo->base_addr + - (readl(&firm_id->zfwctrl_addr) & - 0xfffff); - - board_ctrl = &zfw_ctrl->board_ctrl; - /* Enable interrupts on the PLX chip */ intr = readw(&cinfo->ctl_addr.p9060-> intr_ctrl_stat) | 0x0900; @@ -2435,8 +2423,6 @@ static int cy_open(struct tty_struct *tty, struct file *filp) printk(KERN_ERR "cyc:IRQ enable retval " "was %x\n", retval); } - cinfo->nports = - (int)readl(&board_ctrl->n_channel); cinfo->intr_enabled = 1; } } @@ -4340,30 +4326,20 @@ static void cy_hangup(struct tty_struct *tty) static int __devinit cy_init_card(struct cyclades_card *cinfo) { struct cyclades_port *info; - unsigned int nports, port; + unsigned int port; unsigned short chip_number; - int uninitialized_var(index); spin_lock_init(&cinfo->card_lock); + cinfo->intr_enabled = 0; - if (cy_is_Z(cinfo)) { /* Cyclades-Z */ - nports = (cinfo->hw_ver == ZE_V1) ? ZE_V1_NPORTS : 8; - cinfo->intr_enabled = 0; - cinfo->nports = 0; /* Will be correctly set later, after - Z FW is loaded */ - } else { - index = cinfo->bus_index; - nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips; - } - - cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL); + cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports), + GFP_KERNEL); if (cinfo->ports == NULL) { printk(KERN_ERR "Cyclades: cannot allocate ports\n"); - cinfo->nports = 0; return -ENOMEM; } - for (port = cinfo->first_line; port < cinfo->first_line + nports; + for (port = cinfo->first_line; port < cinfo->first_line + cinfo->nports; port++) { info = &cinfo->ports[port - cinfo->first_line]; tty_port_init(&info->port); @@ -4388,6 +4364,7 @@ static int __devinit cy_init_card(struct cyclades_card *cinfo) cyz_rx_restart, (unsigned long)info); #endif } else { + int index = cinfo->bus_index; info->type = PORT_CIRRUS; info->xmit_fifo_size = CyMAX_CHAR_FIFO; info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS; @@ -4615,7 +4592,8 @@ static int __init cy_detect_isa(void) cy_card[j].irq = (int)cy_isa_irq; cy_card[j].bus_index = 0; cy_card[j].first_line = cy_next_channel; - cy_card[j].num_chips = cy_isa_nchan / 4; + cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP; + cy_card[j].nports = cy_isa_nchan; if (cy_init_card(&cy_card[j])) { cy_card[j].base_addr = NULL; free_irq(cy_isa_irq, &cy_card[j]); @@ -4771,7 +4749,7 @@ static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr, struct CUSTOM_REG __iomem *cust = base_addr; struct ZFW_CTRL __iomem *pt_zfwctrl; void __iomem *tmp; - u32 mailbox, status; + u32 mailbox, status, nchan; unsigned int i; int retval; @@ -4892,11 +4870,11 @@ static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr, base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr), base_addr + readl(&fid->zfwctrl_addr)); + nchan = readl(&pt_zfwctrl->board_ctrl.n_channel); dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n", - readl(&pt_zfwctrl->board_ctrl.fw_version), - readl(&pt_zfwctrl->board_ctrl.n_channel)); + readl(&pt_zfwctrl->board_ctrl.fw_version), nchan); - if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) { + if (nchan == 0) { dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please " "check the connection between the Z host card and the " "serial expanders.\n"); @@ -4922,7 +4900,7 @@ static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr, cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) | 0x00030800UL); - return 0; + return nchan; err_rel: release_firmware(fw); err: @@ -5027,12 +5005,8 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev, if (mailbox == ZE_V1) { card_name = "Cyclades-Ze"; - - nchan = ZE_V1_NPORTS; } else { card_name = "Cyclades-8Zo"; - nchan = 8; - #ifdef CY_PCI_DEBUG if (mailbox == ZO_V1) { cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); @@ -5057,8 +5031,9 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev, } retval = cyz_load_fw(pdev, addr2, addr0, irq); - if (retval) + if (retval <= 0) goto err_unmap; + nchan = retval; } if ((cy_next_channel + nchan) > NR_PORTS) { @@ -5088,7 +5063,7 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev, dev_err(&pdev->dev, "could not allocate IRQ\n"); goto err_unmap; } - cy_card[card_no].num_chips = nchan / 4; + cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP; } else { cy_card[card_no].hw_ver = mailbox; cy_card[card_no].num_chips = (unsigned int)-1; @@ -5112,6 +5087,7 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev, cy_card[card_no].irq = irq; cy_card[card_no].bus_index = 1; cy_card[card_no].first_line = cy_next_channel; + cy_card[card_no].nports = nchan; retval = cy_init_card(&cy_card[card_no]); if (retval) goto err_null; -- 1.6.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/