diff options
Diffstat (limited to 'meta/recipes-kernel/linux/linux-netbook-2.6.33.2/linux-2.6.33-ahci-fix-oops-on-dummy-port.patch')
-rw-r--r-- | meta/recipes-kernel/linux/linux-netbook-2.6.33.2/linux-2.6.33-ahci-fix-oops-on-dummy-port.patch | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/meta/recipes-kernel/linux/linux-netbook-2.6.33.2/linux-2.6.33-ahci-fix-oops-on-dummy-port.patch b/meta/recipes-kernel/linux/linux-netbook-2.6.33.2/linux-2.6.33-ahci-fix-oops-on-dummy-port.patch new file mode 100644 index 000000000..103c7f65a --- /dev/null +++ b/meta/recipes-kernel/linux/linux-netbook-2.6.33.2/linux-2.6.33-ahci-fix-oops-on-dummy-port.patch @@ -0,0 +1,53 @@ +From: Yong Wang <yong.y.wang@intel.com> +Date: Thu Mar 11 15:31:50 2010 +0800 +Subject: [PATCH] ahci: Fix accounting oops on dummy port + +Not all ports are implemented in AHCI mode on some machines. +If this is the case, it results in NULL pointer dereference +when doing alpm accounting. Skip such dummy ports. + +Signed-off-by: Yong Wang <yong.y.wang@intel.com> +--- + drivers/ata/ahci.c | 10 ++++++++-- + 1 file changed, 8 insertions(+), 2 deletions(-) + +--- a/drivers/ata/ahci.c ++++ b/drivers/ata/ahci.c +@@ -2283,8 +2283,8 @@ static ssize_t ahci_alpm_show_active(str + struct ata_port *ap = ata_shost_to_port(shost); + struct ahci_port_priv *pp; + +- if (!ap) +- return; ++ if (!ap || ata_port_is_dummy(ap)) ++ return 0; + pp = ap->private_data; + account_alpm_stats(ap); + +@@ -2298,6 +2298,8 @@ static ssize_t ahci_alpm_show_partial(st + struct ata_port *ap = ata_shost_to_port(shost); + struct ahci_port_priv *pp = ap->private_data; + ++ if (!ap || ata_port_is_dummy(ap)) ++ return 0; + account_alpm_stats(ap); + + return sprintf(buf, "%u\n", jiffies_to_msecs(pp->partial_jiffies)); +@@ -2310,6 +2312,8 @@ static ssize_t ahci_alpm_show_slumber(st + struct ata_port *ap = ata_shost_to_port(shost); + struct ahci_port_priv *pp = ap->private_data; + ++ if (!ap || ata_port_is_dummy(ap)) ++ return 0; + account_alpm_stats(ap); + + return sprintf(buf, "%u\n", jiffies_to_msecs(pp->slumber_jiffies)); +@@ -2323,6 +2327,8 @@ static ssize_t ahci_alpm_show_accounting + struct ata_port *ap = ata_shost_to_port(shost); + struct ahci_port_priv *pp = ap->private_data; + ++ if (!ap || ata_port_is_dummy(ap)) ++ return 0; + return sprintf(buf, "%u\n", pp->accounting_active); + } + |