From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753072AbYLMXlK (ORCPT ); Sat, 13 Dec 2008 18:41:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753230AbYLMXkD (ORCPT ); Sat, 13 Dec 2008 18:40:03 -0500 Received: from fk-out-0910.google.com ([209.85.128.188]:35079 "EHLO fk-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753295AbYLMXj6 (ORCPT ); Sat, 13 Dec 2008 18:39:58 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:date:message-id:in-reply-to:references:subject; b=TPL1D4Bn4C3ksU9RKhOz/i9B/o8yGgpGogPG+eVHAyoBM7RjGN+CrNUI0Y2NxlhulV 78tWksZhuuS2U4IcZXDJs/ICJOClXqrh1dzlI7gb+Wy74LyoIwkzeQ++3B83s6/1K8Lx 2TNmyjVMbjQJUUTyq6n2+DiFx/1zg4Z3zjzcQ= From: Bartlomiej Zolnierkiewicz To: linux-ide@vger.kernel.org Cc: Bartlomiej Zolnierkiewicz , linux-kernel@vger.kernel.org Date: Sun, 14 Dec 2008 00:39:39 +0100 Message-Id: <20081213233939.4653.49654.sendpatchset@localhost.localdomain> In-Reply-To: <20081213233925.4653.58008.sendpatchset@localhost.localdomain> References: <20081213233925.4653.58008.sendpatchset@localhost.localdomain> Subject: [PATCH 2/6] ide: add ->cur_port to struct ide_host and use it for serialized hosts Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bartlomiej Zolnierkiewicz Subject: [PATCH] ide: add ->cur_port to struct ide_host and use it for serialized hosts * Pass 'ide_hwif_t *' instead of 'ide_hwgroup_t *' to unexpected_intr(). * Cache pointer to the port currently being serviced in ->cur_port and use it instead of hwif->hwgroup on serialized hosts. Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-io.c | 25 +++++++++++++++---------- include/linux/ide.h | 1 + 2 files changed, 16 insertions(+), 10 deletions(-) Index: b/drivers/ide/ide-io.c =================================================================== --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -726,7 +726,7 @@ void do_ide_request(struct request_queue if (!ide_lock_hwgroup(hwgroup)) { ide_hwif_t *prev_port; repeat: - prev_port = hwgroup->hwif; + prev_port = hwif->host->cur_port; hwgroup->rq = NULL; if (drive->dev_flags & IDE_DFLAG_SLEEPING) { @@ -736,15 +736,17 @@ repeat: } } - if (hwif != prev_port) { + if ((hwif->host->host_flags & IDE_HFLAG_SERIALIZE) && + hwif != prev_port) { /* * set nIEN for previous port, drives in the * quirk_list may not like intr setups/cleanups */ - if (hwgroup->drive->quirk_list == 0) + if (prev_port && hwgroup->drive->quirk_list == 0) prev_port->tp_ops->set_irq(prev_port, 0); + + hwif->host->cur_port = hwif; } - hwgroup->hwif = hwif; hwgroup->drive = drive; drive->dev_flags &= ~(IDE_DFLAG_SLEEPING | IDE_DFLAG_PARKED); @@ -976,7 +978,7 @@ void ide_timer_expiry (unsigned long dat /** * unexpected_intr - handle an unexpected IDE interrupt * @irq: interrupt line - * @hwgroup: hwgroup being processed + * @hwif: port being processed * * There's nothing really useful we can do with an unexpected interrupt, * other than reading the status register (to clear it), and logging it. @@ -1005,11 +1007,11 @@ void ide_timer_expiry (unsigned long dat * is doing the current command, but we don't know which hwif burped * mysteriously. */ - -static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup) + +static void unexpected_intr(int irq, ide_hwif_t *hwif) { + ide_hwgroup_t *hwgroup = hwif->hwgroup; u8 stat; - ide_hwif_t *hwif = hwgroup->hwif; /* * handle the unexpected interrupt @@ -1044,7 +1046,7 @@ static void unexpected_intr (int irq, id * not need to override it. If you do be aware it is subtle in * places * - * hwgroup->hwif is the interface in the group currently performing + * hwif is the interface in the group currently performing * a command. hwgroup->drive is the drive and hwgroup->handler is * the IRQ handler to call. As we issue a command the handlers * step through multiple states, reassigning the handler to the @@ -1070,6 +1072,9 @@ irqreturn_t ide_intr (int irq, void *dev irqreturn_t irq_ret = IRQ_NONE; int plug_device = 0; + if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) + hwif = hwif->host->cur_port; + spin_lock_irqsave(&hwgroup->lock, flags); if (!ide_ack_intr(hwif)) @@ -1099,7 +1104,7 @@ irqreturn_t ide_intr (int irq, void *dev * Probably not a shared PCI interrupt, * so we can safely try to do something about it: */ - unexpected_intr(irq, hwgroup); + unexpected_intr(irq, hwif); #ifdef CONFIG_BLK_DEV_IDEPCI } else { /* Index: b/include/linux/ide.h =================================================================== --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -852,6 +852,7 @@ struct ide_host { unsigned int (*init_chipset)(struct pci_dev *); unsigned long host_flags; void *host_priv; + ide_hwif_t *cur_port; /* for hosts requiring serialization */ }; /*