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| author | Dan Williams <dan.j.williams@intel.com> | 2014-06-17 16:16:27 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-17 17:04:39 -0700 |
| commit | 6c79fe4afcb0450bd638f6e959e512aad270ff2f (patch) | |
| tree | 10e7f6a082cd83d15139ce3e666e061ca69d5f0b /drivers/usb/core | |
| parent | b658b8f5c09d3d1db9641c9d520b36b3e4c0d744 (diff) | |
| download | linux-stable-6c79fe4afcb0450bd638f6e959e512aad270ff2f.tar.gz linux-stable-6c79fe4afcb0450bd638f6e959e512aad270ff2f.tar.bz2 linux-stable-6c79fe4afcb0450bd638f6e959e512aad270ff2f.zip | |
usb: quiet peer failure warning, disable poweroff
In the case where platform firmware has specified conflicting values for
port locations it is confusing and otherwise not helpful to throw a
backtrace. Instead, include enough information to determine that
firmware has done something wrong and globally disable port poweroff.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/core')
| -rw-r--r-- | drivers/usb/core/port.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c index 62036faf56c0..9347ade7d5fe 100644 --- a/drivers/usb/core/port.c +++ b/drivers/usb/core/port.c @@ -21,6 +21,8 @@ #include "hub.h" +static int usb_port_block_power_off; + static const struct attribute_group *port_dev_group[]; static ssize_t connect_type_show(struct device *dev, @@ -142,6 +144,9 @@ static int usb_port_runtime_suspend(struct device *dev) == PM_QOS_FLAGS_ALL) return -EAGAIN; + if (usb_port_block_power_off) + return -EBUSY; + usb_autopm_get_interface(intf); retval = usb_hub_set_port_power(hdev, hub, port1, false); usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_CONNECTION); @@ -190,11 +195,19 @@ static int link_peers(struct usb_port *left, struct usb_port *right) if (left->peer || right->peer) { struct usb_port *lpeer = left->peer; struct usb_port *rpeer = right->peer; - - WARN(1, "failed to peer %s and %s (%s -> %p) (%s -> %p)\n", - dev_name(&left->dev), dev_name(&right->dev), - dev_name(&left->dev), lpeer, - dev_name(&right->dev), rpeer); + char *method; + + if (left->location && left->location == right->location) + method = "location"; + else + method = "default"; + + pr_warn("usb: failed to peer %s and %s by %s (%s:%s) (%s:%s)\n", + dev_name(&left->dev), dev_name(&right->dev), method, + dev_name(&left->dev), + lpeer ? dev_name(&lpeer->dev) : "none", + dev_name(&right->dev), + rpeer ? dev_name(&rpeer->dev) : "none"); return -EBUSY; } @@ -251,6 +264,7 @@ static void link_peers_report(struct usb_port *left, struct usb_port *right) dev_warn(&left->dev, "failed to peer to %s (%d)\n", dev_name(&right->dev), rc); pr_warn_once("usb: port power management may be unreliable\n"); + usb_port_block_power_off = 1; } } |