Date: Fri, 8 Jun 2012 12:56:10 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r236752 - in stable/8/sys: kern sys Message-ID: <201206081256.q58CuASe060279@svn.freebsd.org>
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Author: mav Date: Fri Jun 8 12:56:10 2012 New Revision: 236752 URL: http://svn.freebsd.org/changeset/base/236752 Log: Partially MFC r227701, r227847 and r227849 (by hselasky): Provide new device_delete_children() KPI without touching all consumers. Modified: stable/8/sys/kern/subr_bus.c stable/8/sys/sys/bus.h Modified: stable/8/sys/kern/subr_bus.c ============================================================================== --- stable/8/sys/kern/subr_bus.c Fri Jun 8 12:36:08 2012 (r236751) +++ stable/8/sys/kern/subr_bus.c Fri Jun 8 12:56:10 2012 (r236752) @@ -1897,7 +1897,7 @@ device_delete_child(device_t dev, device PDEBUG(("%s from %s", DEVICENAME(child), DEVICENAME(dev))); /* remove children first */ - while ( (grandchild = TAILQ_FIRST(&child->children)) ) { + while ((grandchild = TAILQ_FIRST(&child->children)) != NULL) { error = device_delete_child(child, grandchild); if (error) return (error); @@ -1916,6 +1916,39 @@ device_delete_child(device_t dev, device } /** + * @brief Delete all children devices of the given device, if any. + * + * This function deletes all children devices of the given device, if + * any, using the device_delete_child() function for each device it + * finds. If a child device cannot be deleted, this function will + * return an error code. + * + * @param dev the parent device + * + * @retval 0 success + * @retval non-zero a device would not detach + */ +int +device_delete_children(device_t dev) +{ + device_t child; + int error; + + PDEBUG(("Deleting all children of %s", DEVICENAME(dev))); + + error = 0; + + while ((child = TAILQ_FIRST(&dev->children)) != NULL) { + error = device_delete_child(dev, child); + if (error) { + PDEBUG(("Failed deleting %s", DEVICENAME(child))); + break; + } + } + return (error); +} + +/** * @brief Find a device given a unit number * * This is similar to devclass_get_devices() but only searches for Modified: stable/8/sys/sys/bus.h ============================================================================== --- stable/8/sys/sys/bus.h Fri Jun 8 12:36:08 2012 (r236751) +++ stable/8/sys/sys/bus.h Fri Jun 8 12:56:10 2012 (r236752) @@ -407,6 +407,7 @@ device_t device_add_child_ordered(device const char *name, int unit); void device_busy(device_t dev); int device_delete_child(device_t dev, device_t child); +int device_delete_children(device_t dev); int device_attach(device_t dev); int device_detach(device_t dev); void device_disable(device_t dev);
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