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| author | Alex Shi <alex.shi@linaro.org> | 2015-03-19 08:57:07 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2015-03-19 08:57:07 +0800 |
| commit | 42f45c9abdea541a9f966553b5e71dd576d432f9 (patch) | |
| tree | e9189f804b03d19696b0944a5a34ea9427177646 /drivers/staging/comedi/comedi_compat32.c | |
| parent | 4d8fd56f051e5eea61209de4a3cb0619283a30af (diff) | |
| parent | ba0bfedf4c9cad58f56a7038d1462ffc21cd33df (diff) | |
Merge branch 'linux-linaro-lsk' into linux-linaro-lsk-androidlsk-v3.10-15.03-android
Diffstat (limited to 'drivers/staging/comedi/comedi_compat32.c')
| -rw-r--r-- | drivers/staging/comedi/comedi_compat32.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/staging/comedi/comedi_compat32.c b/drivers/staging/comedi/comedi_compat32.c index ad208cdd53d4..83bcf968ac63 100644 --- a/drivers/staging/comedi/comedi_compat32.c +++ b/drivers/staging/comedi/comedi_compat32.c @@ -270,7 +270,7 @@ static int compat_cmd(struct file *file, unsigned long arg) { struct comedi_cmd __user *cmd; struct comedi32_cmd_struct __user *cmd32; - int rc; + int rc, err; cmd32 = compat_ptr(arg); cmd = compat_alloc_user_space(sizeof(*cmd)); @@ -279,7 +279,15 @@ static int compat_cmd(struct file *file, unsigned long arg) if (rc) return rc; - return translated_ioctl(file, COMEDI_CMD, (unsigned long)cmd); + rc = translated_ioctl(file, COMEDI_CMD, (unsigned long)cmd); + if (rc == -EAGAIN) { + /* Special case: copy cmd back to user. */ + err = put_compat_cmd(cmd32, cmd); + if (err) + rc = err; + } + + return rc; } /* Handle 32-bit COMEDI_CMDTEST ioctl. */ |