From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shaohua Li Subject: Re: still crap in pci_choose_state Date: Tue, 12 Jul 2005 16:28:08 +0800 Message-ID: <1121156888.18837.3.camel@linux-hp.sh.intel.com> References: <16A54BF5D6E14E4D916CE26C9AD30575029F0E1A@pdsmsx402.ccr.corp.intel.com> <20050712075344.GB1854@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20050712075344.GB1854-I/5MKhXcvmPrBKCeMvbIDA@public.gmane.org> Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Pavel Machek Cc: "Brown, Len" , Andrew Morton , acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Hi, On Tue, 2005-07-12 at 09:53 +0200, Pavel Machek wrote: > Hi! > > > >This is in drivers/pci/pci.c; and it is still wrong. You can't just > > >retype int into pm_message_t. Make it pm_message_t &state, and return > > >only success/failure in platform_pci_choose_state return value. Or add > > >PCI_POWER_ERROR to pci_power_t enum and use that. > > > Pavel > > > > > >int (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t > > state); > > > > > >pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) > > >{ > > > int ret; > > > if (!pci_find_capability(dev, PCI_CAP_ID_PM)) > > > return PCI_D0; > > > > > > if (platform_pci_choose_state) { > > > ret = platform_pci_choose_state(dev, state); > > > if (ret >= 0) > > > state = ret; > > > } > > > switch (state) { > > Ok, I'll do it soon. Is the pm_message_t a structure now? I plan to fix > > it after pm_message_t structure change (current pm_message_t is really > > useless for ACPI), but maybe I should fix the bug at hand first. > > I tried to turn pm_message_t into structure two times already, but > failed both times :-(. Fixing it after pm_message_t=>structure change > is a bit too late, because it will cause compile problems to akpm in > the meantime... Is this one ok with you? platform_choose_state accepts pm_message_t as a parameter seems ok to me. ACPI must know the suspend is S1, S3 or S4 and take different actions. Thanks, Shaohua --- linux-2.6.13-rc1-mm1-root/drivers/pci/pci-acpi.c | 4 ++-- linux-2.6.13-rc1-mm1-root/drivers/pci/pci.c | 8 ++++---- linux-2.6.13-rc1-mm1-root/drivers/pci/pci.h | 2 +- 3 files changed, 7 insertions(+), 7 deletions(-) diff -puN drivers/pci/pci.c~acpi_choose_state drivers/pci/pci.c --- linux-2.6.13-rc1-mm1/drivers/pci/pci.c~acpi_choose_state 2005-07-12 16:00:23.533189008 +0800 +++ linux-2.6.13-rc1-mm1-root/drivers/pci/pci.c 2005-07-12 16:15:50.467273608 +0800 @@ -320,18 +320,18 @@ pci_set_power_state(struct pci_dev *dev, * Returns PCI power state suitable for given device and given system * message. */ -int (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state); +pci_power_t (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state); pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { - int ret; + pci_power_t ret; if (!pci_find_capability(dev, PCI_CAP_ID_PM)) return PCI_D0; if (platform_pci_choose_state) { ret = platform_pci_choose_state(dev, state); - if (ret >= 0) - state = ret; + if (ret != PCI_POWER_ERROR) + return ret; } switch (state) { case 0: return PCI_D0; diff -puN drivers/pci/pci-acpi.c~acpi_choose_state drivers/pci/pci-acpi.c --- linux-2.6.13-rc1-mm1/drivers/pci/pci-acpi.c~acpi_choose_state 2005-07-12 16:02:40.560357712 +0800 +++ linux-2.6.13-rc1-mm1-root/drivers/pci/pci-acpi.c 2005-07-12 16:16:17.869107896 +0800 @@ -235,11 +235,11 @@ EXPORT_SYMBOL(pci_osc_control_set); * currently we simply return _SxD, if present. */ -static int acpi_pci_choose_state(struct pci_dev *pdev, pm_message_t state) +static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev, pm_message_t state) { /* TBD */ - return -ENODEV; + return PCI_POWER_ERROR; } static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state) diff -puN drivers/pci/pci.h~acpi_choose_state drivers/pci/pci.h --- linux-2.6.13-rc1-mm1/drivers/pci/pci.h~acpi_choose_state 2005-07-12 16:04:39.624257248 +0800 +++ linux-2.6.13-rc1-mm1-root/drivers/pci/pci.h 2005-07-12 16:15:58.390069160 +0800 @@ -12,7 +12,7 @@ extern int pci_bus_alloc_resource(struct unsigned long, unsigned long), void *alignf_data); /* Firmware callbacks */ -extern int (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state); +extern pci_power_t (*platform_pci_choose_state)(struct pci_dev *dev, pm_message_t state); extern int (*platform_pci_set_power_state)(struct pci_dev *dev, pci_power_t state); /* PCI /proc functions */ _ ------------------------------------------------------- This SF.Net email is sponsored by the 'Do More With Dual!' webinar happening July 14 at 8am PDT/11am EDT. 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