| Message ID | 20190723221838.12024-7-suzuki.poulose@arm.com (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | 6bf85ba9e55f659ddc0747bf1bb504ec6d15f525 |
| Headers | show |
| Series | [v3,1/7] drivers: Introduce device lookup variants by name | expand |
On Tue, Jul 23, 2019 at 5:19 PM Suzuki K Poulose <suzuki.poulose@arm.com> wrote: > > Add a generic helper to match any/all devices. Using this > introduce new wrappers {bus/driver/class}_find_next_device(). > > Cc: Bjorn Helgaas <bhelgaas@google.com> > Cc: Elie Morisse <syniurge@gmail.com> > Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> > Cc: "Martin K. Petersen" <martin.petersen@oracle.com> > Cc: Nehal Shah <nehal-bakulchandra.shah@amd.com> > Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> > Cc: Shyam Sundar S K <shyam-sundar.s-k@amd.com> > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> # PCI > --- > drivers/base/core.c | 6 ++++++ > drivers/i2c/busses/i2c-amd-mp2-pci.c | 8 +------- > drivers/pci/probe.c | 7 +------ > drivers/s390/cio/ccwgroup.c | 8 +------- > drivers/scsi/scsi_proc.c | 9 ++------- > include/linux/device.h | 17 +++++++++++++++++ > 6 files changed, 28 insertions(+), 27 deletions(-) > > diff --git a/drivers/base/core.c b/drivers/base/core.c > index 57d71bc2c559..e22e29b3dc97 100644 > --- a/drivers/base/core.c > +++ b/drivers/base/core.c > @@ -3379,3 +3379,9 @@ int device_match_acpi_dev(struct device *dev, const void *adev) > return ACPI_COMPANION(dev) == adev; > } > EXPORT_SYMBOL(device_match_acpi_dev); > + > +int device_match_any(struct device *dev, const void *unused) > +{ > + return 1; > +} > +EXPORT_SYMBOL_GPL(device_match_any); > diff --git a/drivers/i2c/busses/i2c-amd-mp2-pci.c b/drivers/i2c/busses/i2c-amd-mp2-pci.c > index c7fe3b44a860..5e4800d72e00 100644 > --- a/drivers/i2c/busses/i2c-amd-mp2-pci.c > +++ b/drivers/i2c/busses/i2c-amd-mp2-pci.c > @@ -457,18 +457,12 @@ static struct pci_driver amd_mp2_pci_driver = { > }; > module_pci_driver(amd_mp2_pci_driver); > > -static int amd_mp2_device_match(struct device *dev, const void *data) > -{ > - return 1; > -} > - > struct amd_mp2_dev *amd_mp2_find_device(void) > { > struct device *dev; > struct pci_dev *pci_dev; > > - dev = driver_find_device(&amd_mp2_pci_driver.driver, NULL, NULL, > - amd_mp2_device_match); > + dev = driver_find_next_device(&amd_mp2_pci_driver.driver, NULL); > if (!dev) > return NULL; > > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c > index a3c7338fad86..dbeeb385fb9f 100644 > --- a/drivers/pci/probe.c > +++ b/drivers/pci/probe.c > @@ -64,11 +64,6 @@ static struct resource *get_pci_domain_busn_res(int domain_nr) > return &r->res; > } > > -static int find_anything(struct device *dev, const void *data) > -{ > - return 1; > -} > - > /* > * Some device drivers need know if PCI is initiated. > * Basically, we think PCI is not initiated when there > @@ -79,7 +74,7 @@ int no_pci_devices(void) > struct device *dev; > int no_devices; > > - dev = bus_find_device(&pci_bus_type, NULL, NULL, find_anything); > + dev = bus_find_next_device(&pci_bus_type, NULL); > no_devices = (dev == NULL); > put_device(dev); > return no_devices; > diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c > index d843e362c167..0005ec9285aa 100644 > --- a/drivers/s390/cio/ccwgroup.c > +++ b/drivers/s390/cio/ccwgroup.c > @@ -581,11 +581,6 @@ int ccwgroup_driver_register(struct ccwgroup_driver *cdriver) > } > EXPORT_SYMBOL(ccwgroup_driver_register); > > -static int __ccwgroup_match_all(struct device *dev, const void *data) > -{ > - return 1; > -} > - > /** > * ccwgroup_driver_unregister() - deregister a ccw group driver > * @cdriver: driver to be deregistered > @@ -597,8 +592,7 @@ void ccwgroup_driver_unregister(struct ccwgroup_driver *cdriver) > struct device *dev; > > /* We don't want ccwgroup devices to live longer than their driver. */ > - while ((dev = driver_find_device(&cdriver->driver, NULL, NULL, > - __ccwgroup_match_all))) { > + while ((dev = driver_find_next_device(&cdriver->driver, NULL))) { > struct ccwgroup_device *gdev = to_ccwgroupdev(dev); > > ccwgroup_ungroup(gdev); > diff --git a/drivers/scsi/scsi_proc.c b/drivers/scsi/scsi_proc.c > index c074631086a4..5b313226f11c 100644 > --- a/drivers/scsi/scsi_proc.c > +++ b/drivers/scsi/scsi_proc.c > @@ -372,15 +372,10 @@ static ssize_t proc_scsi_write(struct file *file, const char __user *buf, > return err; > } > > -static int always_match(struct device *dev, const void *data) > -{ > - return 1; > -} > - > static inline struct device *next_scsi_device(struct device *start) > { > - struct device *next = bus_find_device(&scsi_bus_type, start, NULL, > - always_match); > + struct device *next = bus_find_next_device(&scsi_bus_type, start); > + > put_device(start); > return next; > } > diff --git a/include/linux/device.h b/include/linux/device.h > index 7514ef3d3f1a..8ae3f4b47293 100644 > --- a/include/linux/device.h > +++ b/include/linux/device.h > @@ -169,6 +169,7 @@ int device_match_of_node(struct device *dev, const void *np); > int device_match_fwnode(struct device *dev, const void *fwnode); > int device_match_devt(struct device *dev, const void *pdevt); > int device_match_acpi_dev(struct device *dev, const void *adev); > +int device_match_any(struct device *dev, const void *unused); > > int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, > int (*fn)(struct device *dev, void *data)); > @@ -225,6 +226,16 @@ static inline struct device *bus_find_device_by_devt(struct bus_type *bus, > return bus_find_device(bus, NULL, &devt, device_match_devt); > } > > +/** > + * bus_find_next_device - Find the next device after a given device in a > + * given bus. > + */ > +static inline struct device * > +bus_find_next_device(struct bus_type *bus,struct device *cur) > +{ > + return bus_find_device(bus, cur, NULL, device_match_any); > +} > + > #ifdef CONFIG_ACPI > struct acpi_device; > > @@ -465,6 +476,12 @@ static inline struct device *driver_find_device_by_devt(struct device_driver *dr > return driver_find_device(drv, NULL, &devt, device_match_devt); > } > > +static inline struct device *driver_find_next_device(struct device_driver *drv, > + struct device *start) > +{ > + return driver_find_device(drv, start, NULL, device_match_any); > +} > + > #ifdef CONFIG_ACPI > /** > * driver_find_device_by_acpi_dev : device iterator for locating a particular > -- > 2.21.0 >
diff --git a/drivers/base/core.c b/drivers/base/core.c index 57d71bc2c559..e22e29b3dc97 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -3379,3 +3379,9 @@ int device_match_acpi_dev(struct device *dev, const void *adev) return ACPI_COMPANION(dev) == adev; } EXPORT_SYMBOL(device_match_acpi_dev); + +int device_match_any(struct device *dev, const void *unused) +{ + return 1; +} +EXPORT_SYMBOL_GPL(device_match_any); diff --git a/drivers/i2c/busses/i2c-amd-mp2-pci.c b/drivers/i2c/busses/i2c-amd-mp2-pci.c index c7fe3b44a860..5e4800d72e00 100644 --- a/drivers/i2c/busses/i2c-amd-mp2-pci.c +++ b/drivers/i2c/busses/i2c-amd-mp2-pci.c @@ -457,18 +457,12 @@ static struct pci_driver amd_mp2_pci_driver = { }; module_pci_driver(amd_mp2_pci_driver); -static int amd_mp2_device_match(struct device *dev, const void *data) -{ - return 1; -} - struct amd_mp2_dev *amd_mp2_find_device(void) { struct device *dev; struct pci_dev *pci_dev; - dev = driver_find_device(&amd_mp2_pci_driver.driver, NULL, NULL, - amd_mp2_device_match); + dev = driver_find_next_device(&amd_mp2_pci_driver.driver, NULL); if (!dev) return NULL; diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index a3c7338fad86..dbeeb385fb9f 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -64,11 +64,6 @@ static struct resource *get_pci_domain_busn_res(int domain_nr) return &r->res; } -static int find_anything(struct device *dev, const void *data) -{ - return 1; -} - /* * Some device drivers need know if PCI is initiated. * Basically, we think PCI is not initiated when there @@ -79,7 +74,7 @@ int no_pci_devices(void) struct device *dev; int no_devices; - dev = bus_find_device(&pci_bus_type, NULL, NULL, find_anything); + dev = bus_find_next_device(&pci_bus_type, NULL); no_devices = (dev == NULL); put_device(dev); return no_devices; diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c index d843e362c167..0005ec9285aa 100644 --- a/drivers/s390/cio/ccwgroup.c +++ b/drivers/s390/cio/ccwgroup.c @@ -581,11 +581,6 @@ int ccwgroup_driver_register(struct ccwgroup_driver *cdriver) } EXPORT_SYMBOL(ccwgroup_driver_register); -static int __ccwgroup_match_all(struct device *dev, const void *data) -{ - return 1; -} - /** * ccwgroup_driver_unregister() - deregister a ccw group driver * @cdriver: driver to be deregistered @@ -597,8 +592,7 @@ void ccwgroup_driver_unregister(struct ccwgroup_driver *cdriver) struct device *dev; /* We don't want ccwgroup devices to live longer than their driver. */ - while ((dev = driver_find_device(&cdriver->driver, NULL, NULL, - __ccwgroup_match_all))) { + while ((dev = driver_find_next_device(&cdriver->driver, NULL))) { struct ccwgroup_device *gdev = to_ccwgroupdev(dev); ccwgroup_ungroup(gdev); diff --git a/drivers/scsi/scsi_proc.c b/drivers/scsi/scsi_proc.c index c074631086a4..5b313226f11c 100644 --- a/drivers/scsi/scsi_proc.c +++ b/drivers/scsi/scsi_proc.c @@ -372,15 +372,10 @@ static ssize_t proc_scsi_write(struct file *file, const char __user *buf, return err; } -static int always_match(struct device *dev, const void *data) -{ - return 1; -} - static inline struct device *next_scsi_device(struct device *start) { - struct device *next = bus_find_device(&scsi_bus_type, start, NULL, - always_match); + struct device *next = bus_find_next_device(&scsi_bus_type, start); + put_device(start); return next; } diff --git a/include/linux/device.h b/include/linux/device.h index 7514ef3d3f1a..8ae3f4b47293 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -169,6 +169,7 @@ int device_match_of_node(struct device *dev, const void *np); int device_match_fwnode(struct device *dev, const void *fwnode); int device_match_devt(struct device *dev, const void *pdevt); int device_match_acpi_dev(struct device *dev, const void *adev); +int device_match_any(struct device *dev, const void *unused); int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, int (*fn)(struct device *dev, void *data)); @@ -225,6 +226,16 @@ static inline struct device *bus_find_device_by_devt(struct bus_type *bus, return bus_find_device(bus, NULL, &devt, device_match_devt); } +/** + * bus_find_next_device - Find the next device after a given device in a + * given bus. + */ +static inline struct device * +bus_find_next_device(struct bus_type *bus,struct device *cur) +{ + return bus_find_device(bus, cur, NULL, device_match_any); +} + #ifdef CONFIG_ACPI struct acpi_device; @@ -465,6 +476,12 @@ static inline struct device *driver_find_device_by_devt(struct device_driver *dr return driver_find_device(drv, NULL, &devt, device_match_devt); } +static inline struct device *driver_find_next_device(struct device_driver *drv, + struct device *start) +{ + return driver_find_device(drv, start, NULL, device_match_any); +} + #ifdef CONFIG_ACPI /** * driver_find_device_by_acpi_dev : device iterator for locating a particular
Add a generic helper to match any/all devices. Using this introduce new wrappers {bus/driver/class}_find_next_device(). Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Elie Morisse <syniurge@gmail.com> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Nehal Shah <nehal-bakulchandra.shah@amd.com> Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> Cc: Shyam Sundar S K <shyam-sundar.s-k@amd.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- drivers/base/core.c | 6 ++++++ drivers/i2c/busses/i2c-amd-mp2-pci.c | 8 +------- drivers/pci/probe.c | 7 +------ drivers/s390/cio/ccwgroup.c | 8 +------- drivers/scsi/scsi_proc.c | 9 ++------- include/linux/device.h | 17 +++++++++++++++++ 6 files changed, 28 insertions(+), 27 deletions(-)