diff options
Diffstat (limited to 'drivers/usb/gadget/storage_common.c')
| -rw-r--r-- | drivers/usb/gadget/storage_common.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/usb/gadget/storage_common.c b/drivers/usb/gadget/storage_common.c index 3bbddab72e5..484acfb1a7c 100644 --- a/drivers/usb/gadget/storage_common.c +++ b/drivers/usb/gadget/storage_common.c @@ -284,6 +284,7 @@ struct fsg_lun { unsigned int prevent_medium_removal:1; unsigned int registered:1; unsigned int info_valid:1; + unsigned int nofua:1; u32 sense_data; u32 sense_data_info; @@ -714,6 +715,14 @@ static ssize_t fsg_show_ro(struct device *dev, struct device_attribute *attr, : curlun->initially_ro); } +static ssize_t fsg_show_nofua(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct fsg_lun *curlun = fsg_lun_from_dev(dev); + + return sprintf(buf, "%u\n", curlun->nofua); +} + static ssize_t fsg_show_file(struct device *dev, struct device_attribute *attr, char *buf) { @@ -770,6 +779,25 @@ static ssize_t fsg_store_ro(struct device *dev, struct device_attribute *attr, return rc; } +static ssize_t fsg_store_nofua(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct fsg_lun *curlun = fsg_lun_from_dev(dev); + unsigned long nofua; + + if (strict_strtoul(buf, 2, &nofua)) + return -EINVAL; + + /* Sync data when switching from async mode to sync */ + if (!nofua && curlun->nofua) + fsg_lun_fsync_sub(curlun); + + curlun->nofua = nofua; + + return count; +} + static ssize_t fsg_store_file(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { |