diff options
Diffstat (limited to 'drivers/scsi/ufs/ufs-qcom-debugfs.c')
| -rw-r--r-- | drivers/scsi/ufs/ufs-qcom-debugfs.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/scsi/ufs/ufs-qcom-debugfs.c b/drivers/scsi/ufs/ufs-qcom-debugfs.c index 4547a6dbdb23..da670c0e31fa 100644 --- a/drivers/scsi/ufs/ufs-qcom-debugfs.c +++ b/drivers/scsi/ufs/ufs-qcom-debugfs.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2015, Linux Foundation. All rights reserved. + * Copyright (c) 2015,2017, Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -117,6 +117,9 @@ static ssize_t ufs_qcom_dbg_testbus_cfg_write(struct file *file, int ret = 0; int major; int minor; + unsigned long flags; + struct ufs_hba *hba = host->hba; + ret = simple_write_to_buffer(configuration, TESTBUS_CFG_BUFF_LINE_SIZE, &buff_pos, ubuf, cnt); @@ -142,8 +145,15 @@ static ssize_t ufs_qcom_dbg_testbus_cfg_write(struct file *file, goto out; } + if (!ufs_qcom_testbus_cfg_is_ok(host, major, minor)) { + ret = -EPERM; + goto out; + } + + spin_lock_irqsave(hba->host->host_lock, flags); host->testbus.select_major = (u8)major; host->testbus.select_minor = (u8)minor; + spin_unlock_irqrestore(hba->host->host_lock, flags); /* * Sanity check of the {major, minor} tuple is done in the |