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| author | Dan Carpenter <error27@gmail.com> | 2010-06-04 07:34:40 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-08-02 15:28:51 -0300 |
| commit | aac870a8770281c6ad619b538df77840b9513a0b (patch) | |
| tree | 65c7b64f8c7200c64411e8eced9bfddd1e6f3751 /drivers/media/radio/si4713-i2c.c | |
| parent | 398630e4edadac3d21519b8d009e30c3cdd91926 (diff) | |
| download | linux-3.10-aac870a8770281c6ad619b538df77840b9513a0b.tar.gz linux-3.10-aac870a8770281c6ad619b538df77840b9513a0b.tar.bz2 linux-3.10-aac870a8770281c6ad619b538df77840b9513a0b.zip | |
V4L/DVB: media/radio: fix copy_to_user to user handling
copy_to/from_user() returns the number of bytes remaining to be copied
but the code here was testing for negative returns. I modified it to
return -EFAULT. These functions are called from si4713_s_ext_ctrls() and
that only tests for negative error codes.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/radio/si4713-i2c.c')
| -rw-r--r-- | drivers/media/radio/si4713-i2c.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/media/radio/si4713-i2c.c b/drivers/media/radio/si4713-i2c.c index ab63dd5b25c..fc7f4b79464 100644 --- a/drivers/media/radio/si4713-i2c.c +++ b/drivers/media/radio/si4713-i2c.c @@ -1009,8 +1009,10 @@ static int si4713_write_econtrol_string(struct si4713_device *sdev, goto exit; } rval = copy_from_user(ps_name, control->string, len); - if (rval < 0) + if (rval) { + rval = -EFAULT; goto exit; + } ps_name[len] = '\0'; if (strlen(ps_name) % vqc.step) { @@ -1031,8 +1033,10 @@ static int si4713_write_econtrol_string(struct si4713_device *sdev, goto exit; } rval = copy_from_user(radio_text, control->string, len); - if (rval < 0) + if (rval) { + rval = -EFAULT; goto exit; + } radio_text[len] = '\0'; if (strlen(radio_text) % vqc.step) { @@ -1367,6 +1371,8 @@ static int si4713_read_econtrol_string(struct si4713_device *sdev, } rval = copy_to_user(control->string, sdev->rds_info.ps_name, strlen(sdev->rds_info.ps_name) + 1); + if (rval) + rval = -EFAULT; break; case V4L2_CID_RDS_TX_RADIO_TEXT: @@ -1377,6 +1383,8 @@ static int si4713_read_econtrol_string(struct si4713_device *sdev, } rval = copy_to_user(control->string, sdev->rds_info.radio_text, strlen(sdev->rds_info.radio_text) + 1); + if (rval) + rval = -EFAULT; break; default: |