提交 ba5db448 编写于 作者: J Jiri Slaby 提交者: Greg Kroah-Hartman

TTY: coalesce fail paths in tty_open

Move them to the end of the function and use gotos as usual.
Signed-off-by: NJiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
上级 5b5e7040
master alk-4.19.24 alk-4.19.30 alk-4.19.34 alk-4.19.36 alk-4.19.43 alk-4.19.48 alk-4.19.57 ck-4.19.67 ck-4.19.81 ck-4.19.91 github/fork/deepanshu1422/fix-typo-in-comment github/fork/haosdent/fix-typo linux-next v4.19.91 v4.19.90 v4.19.89 v4.19.88 v4.19.87 v4.19.86 v4.19.85 v4.19.84 v4.19.83 v4.19.82 v4.19.81 v4.19.80 v4.19.79 v4.19.78 v4.19.77 v4.19.76 v4.19.75 v4.19.74 v4.19.73 v4.19.72 v4.19.71 v4.19.70 v4.19.69 v4.19.68 v4.19.67 v4.19.66 v4.19.65 v4.19.64 v4.19.63 v4.19.62 v4.19.61 v4.19.60 v4.19.59 v4.19.58 v4.19.57 v4.19.56 v4.19.55 v4.19.54 v4.19.53 v4.19.52 v4.19.51 v4.19.50 v4.19.49 v4.19.48 v4.19.47 v4.19.46 v4.19.45 v4.19.44 v4.19.43 v4.19.42 v4.19.41 v4.19.40 v4.19.39 v4.19.38 v4.19.37 v4.19.36 v4.19.35 v4.19.34 v4.19.33 v4.19.32 v4.19.31 v4.19.30 v4.19.29 v4.19.28 v4.19.27 v4.19.26 v4.19.25 v4.19.24 v4.19.23 v4.19.22 v4.19.21 v4.19.20 v4.19.19 v4.19.18 v4.19.17 v4.19.16 v4.19.15 v4.19.14 v4.19.13 v4.19.12 v4.19.11 v4.19.10 v4.19.9 v4.19.8 v4.19.7 v4.19.6 v4.19.5 v4.19.4 v4.19.3 v4.19.2 v4.19.1 v4.19 v4.19-rc8 v4.19-rc7 v4.19-rc6 v4.19-rc5 v4.19-rc4 v4.19-rc3 v4.19-rc2 v4.19-rc1 ck-release-21 ck-release-20 ck-release-19.2 ck-release-19.1 ck-release-19 ck-release-18 ck-release-17.2 ck-release-17.1 ck-release-17 ck-release-16 ck-release-15.1 ck-release-15 ck-release-14 ck-release-13.2 ck-release-13 ck-release-12 ck-release-11 ck-release-10 ck-release-9 ck-release-7 alk-release-15 alk-release-14 alk-release-13.2 alk-release-13 alk-release-12 alk-release-11 alk-release-10 alk-release-9 alk-release-7
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......@@ -1916,27 +1916,20 @@ static int tty_open(struct inode *inode, struct file *filp)
tty = tty_open_current_tty(device, filp);
if (IS_ERR(tty)) {
tty_unlock();
mutex_unlock(&tty_mutex);
tty_free_file(filp);
return PTR_ERR(tty);
retval = PTR_ERR(tty);
goto err_unlock;
} else if (!tty) {
driver = tty_lookup_driver(device, filp, &noctty, &index);
if (IS_ERR(driver)) {
tty_unlock();
mutex_unlock(&tty_mutex);
tty_free_file(filp);
return PTR_ERR(driver);
retval = PTR_ERR(driver);
goto err_unlock;
}
/* check whether we're reopening an existing tty */
tty = tty_driver_lookup_tty(driver, inode, index);
if (IS_ERR(tty)) {
tty_unlock();
mutex_unlock(&tty_mutex);
tty_driver_kref_put(driver);
tty_free_file(filp);
return PTR_ERR(tty);
retval = PTR_ERR(tty);
goto err_unlock;
}
}
......@@ -1952,8 +1945,8 @@ static int tty_open(struct inode *inode, struct file *filp)
tty_driver_kref_put(driver);
if (IS_ERR(tty)) {
tty_unlock();
tty_free_file(filp);
return PTR_ERR(tty);
retval = PTR_ERR(tty);
goto err_file;
}
tty_add_file(tty, filp);
......@@ -2013,6 +2006,15 @@ static int tty_open(struct inode *inode, struct file *filp)
tty_unlock();
mutex_unlock(&tty_mutex);
return 0;
err_unlock:
tty_unlock();
mutex_unlock(&tty_mutex);
/* after locks to avoid deadlock */
if (!IS_ERR_OR_NULL(driver))
tty_driver_kref_put(driver);
err_file:
tty_free_file(filp);
return retval;
}
......
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