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Date: Thu, 10 May 2012 10:35:02 +0300 From: Hiroshi DOYU <hdoyu@...dia.com> To: <hdoyu@...dia.com> CC: <linux-tegra@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, <linux-kernel@...r.kernel.org> Subject: [RFC 1/1] Driver Core: don't oops with unregistered driver in driver_find_device() driver_find_device() can be called with an unregistered driver. Need to check driver_private to see if it's populated or not, especially under deferrable probe. Signed-off-by: Hiroshi DOYU <hdoyu@...dia.com> --- In [PATCHv5 2/3] ARM: tegra: Add SMMU enabler in AHB: http://article.gmane.org/gmane.linux.ports.tegra/4658 "tegra_ahb_driver" may not be populated when it's called. --- drivers/base/driver.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/base/driver.c b/drivers/base/driver.c index 3ec3896..207c27d 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -80,7 +80,7 @@ struct device *driver_find_device(struct device_driver *drv, struct klist_iter i; struct device *dev; - if (!drv) + if (!drv || !drv->p) return NULL; klist_iter_init_node(&drv->p->klist_devices, &i, -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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