diff options
| author | Marcin Juszkiewicz <hrw@openembedded.org> | 2006-09-08 17:09:02 +0000 |
|---|---|---|
| committer | Marcin Juszkiewicz <hrw@openembedded.org> | 2006-09-08 17:09:02 +0000 |
| commit | 8d43e979e77a19f312ef50f7c55ee34d4843c913 (patch) | |
| tree | 66bb059fa8bf1fc08b12d031dd0b8ea3b9acfe61 /packages/linux/linux-openzaurus-2.6.16/maxpower-message.patch | |
| parent | 469b7173460c5b88fafdf75d41d8e10c3673e09b (diff) | |
linux-openzaurus 2.6.16: backport of USB MaxPower limit information
Revision: 69f0a166098b754a6fa1cbb114317c805f34e399 from .oz354x
Diffstat (limited to 'packages/linux/linux-openzaurus-2.6.16/maxpower-message.patch')
| -rw-r--r-- | packages/linux/linux-openzaurus-2.6.16/maxpower-message.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/packages/linux/linux-openzaurus-2.6.16/maxpower-message.patch b/packages/linux/linux-openzaurus-2.6.16/maxpower-message.patch new file mode 100644 index 0000000000..6e76be4d1c --- /dev/null +++ b/packages/linux/linux-openzaurus-2.6.16/maxpower-message.patch @@ -0,0 +1,55 @@ +From: Daniel Drake <dsd@gentoo.org> +Date: Fri, 26 May 2006 20:36:28 +0000 (+0100) +Subject: [PATCH] USB: print message when device is rejected due to insufficient power +X-Git-Tag: v2.6.18-rc1 +X-Git-Url: http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=1fbe75e12f0dd567c86533e13ba2605f3ecad2e1 + +[PATCH] USB: print message when device is rejected due to insufficient power + +2.6.16 introduces USB power budgeting in the Linux kernel, and since then, a +fair number of users have observed that some of their devices no longer work in +unpowered hubs (this is not a bug, the devices claim that they need more than +100mA). + +The very least we can do is print an informational message to the kernel log +when this happens, otherwise it is not at all clear why the device was not +accepted. + +Signed-off-by: Daniel Drake <dsd@gentoo.org> +Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> +--- + +--- a/drivers/usb/core/hub.c ++++ b/drivers/usb/core/hub.c +@@ -1176,6 +1176,7 @@ static int choose_configuration(struct u + { + int i; + int num_configs; ++ int insufficient_power = 0; + struct usb_host_config *c, *best; + + best = NULL; +@@ -1228,8 +1229,10 @@ static int choose_configuration(struct u + */ + + /* Rule out configs that draw too much bus current */ +- if (c->desc.bMaxPower * 2 > udev->bus_mA) ++ if (c->desc.bMaxPower * 2 > udev->bus_mA) { ++ insufficient_power++; + continue; ++ } + + /* If the first config's first interface is COMM/2/0xff + * (MSFT RNDIS), rule it out unless Linux has host-side +@@ -1263,6 +1266,11 @@ static int choose_configuration(struct u + best = c; + } + ++ if (insufficient_power > 0) ++ dev_info(&udev->dev, "rejected %d configuration%s " ++ "due to insufficient available bus power\n", ++ insufficient_power, plural(insufficient_power)); ++ + if (best) { + i = best->desc.bConfigurationValue; + dev_info(&udev->dev, |