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| author | Thomas Pugliese <thomas.pugliese@gmail.com> | 2013-06-18 13:31:26 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-24 16:19:02 -0700 |
| commit | f265d4d3c2c36e4a35a604593dc8f2905581008f (patch) | |
| tree | 410fa5a93a4a0bba8a239c2a37843049779fb4d9 /drivers/usb/wusbcore/wusbhc.c | |
| parent | 8bf1d0712d54bcb7c55b3f03b2c1a2f6fdfa6536 (diff) | |
| download | linux-f265d4d3c2c36e4a35a604593dc8f2905581008f.tar.bz2 | |
wusbcore: add sysfs attribute for retry count
This patch adds a sysfs attribute for the wireless host controller
transaction retry count. It also changes the default value from 15
retries to infinite retries because the driver currently does not handle
retry errors gracefully.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/wusbcore/wusbhc.c')
| -rw-r--r-- | drivers/usb/wusbcore/wusbhc.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/usb/wusbcore/wusbhc.c b/drivers/usb/wusbcore/wusbhc.c index 8759aa66da28..e712af3e46c2 100644 --- a/drivers/usb/wusbcore/wusbhc.c +++ b/drivers/usb/wusbcore/wusbhc.c @@ -205,12 +205,42 @@ static ssize_t wusb_dnts_store(struct device *dev, } static DEVICE_ATTR(wusb_dnts, 0644, wusb_dnts_show, wusb_dnts_store); +static ssize_t wusb_retry_count_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev); + + return sprintf(buf, "%d\n", wusbhc->retry_count); +} + +static ssize_t wusb_retry_count_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t size) +{ + struct wusbhc *wusbhc = usbhc_dev_to_wusbhc(dev); + uint8_t retry_count; + ssize_t result; + + result = sscanf(buf, "%hhu", &retry_count); + + if (result != 1) + return -EINVAL; + + wusbhc->retry_count = max_t(uint8_t, retry_count, WUSB_RETRY_COUNT_MAX); + + return size; +} +static DEVICE_ATTR(wusb_retry_count, 0644, wusb_retry_count_show, + wusb_retry_count_store); + /* Group all the WUSBHC attributes */ static struct attribute *wusbhc_attrs[] = { &dev_attr_wusb_trust_timeout.attr, &dev_attr_wusb_chid.attr, &dev_attr_wusb_phy_rate.attr, &dev_attr_wusb_dnts.attr, + &dev_attr_wusb_retry_count.attr, NULL, }; @@ -241,6 +271,7 @@ int wusbhc_create(struct wusbhc *wusbhc) wusbhc->phy_rate = UWB_PHY_RATE_INVALID - 1; wusbhc->dnts_num_slots = 4; wusbhc->dnts_interval = 2; + wusbhc->retry_count = WUSB_RETRY_COUNT_INFINITE; mutex_init(&wusbhc->mutex); result = wusbhc_mmcie_create(wusbhc); |