From 9ea244b4b545ecb323d042a0df5c080edefcd1fc Mon Sep 17 00:00:00 2001 From: "Loren M. Lang" Date: Fri, 3 Feb 2006 03:04:59 -0800 Subject: [PATCH] [PATCH] RocketPoint 1520 [hpt366] fails clock stabilization I just purchased a HighPoint Rocket 1520 SATA controller. There seems to be no libata driver (yet), but there is an ide driver, hpt366. When the driver gets loaded, it causes a kernel NULL pointer dereference in pci_bus_clock_list. It seems to be because the driver is waiting for clock stabilization in init_hpt37x() which never comes. The driver just continues on with the pci drvdata set to NULL, instead of a valid clock entry. The following patch prevents the NULL dereference from happening, but instead exit with an error. Acked-by: Bartlomiej Zolnierkiewicz Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/ide/pci/hpt366.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/ide/pci/hpt366.c b/drivers/ide/pci/hpt366.c index 7b589d948bf9..940bdd4c5784 100644 --- a/drivers/ide/pci/hpt366.c +++ b/drivers/ide/pci/hpt366.c @@ -1288,6 +1288,10 @@ static void __devinit hpt37x_clocking(ide_hwif_t *hwif) goto init_hpt37X_done; } } + if (!pci_get_drvdata(dev)) { + printk("No Clock Stabilization!!!\n"); + return; + } pll_recal: if (adjust & 1) pll -= (adjust >> 1);