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path: root/drivers/media/dvb/bt8xx/dst_ca.c
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Diffstat (limited to 'drivers/media/dvb/bt8xx/dst_ca.c')
-rw-r--r--drivers/media/dvb/bt8xx/dst_ca.c52
1 files changed, 37 insertions, 15 deletions
diff --git a/drivers/media/dvb/bt8xx/dst_ca.c b/drivers/media/dvb/bt8xx/dst_ca.c
index 492e829fe021..f77fda77b638 100644
--- a/drivers/media/dvb/bt8xx/dst_ca.c
+++ b/drivers/media/dvb/bt8xx/dst_ca.c
@@ -407,6 +407,7 @@ static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message,
u32 command = 0;
struct ca_msg *hw_buffer;
+ int result = 0;
if ((hw_buffer = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
@@ -414,8 +415,11 @@ static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message,
}
dprintk(verbose, DST_CA_DEBUG, 1, " ");
- if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg)))
- return -EFAULT;
+ if (copy_from_user(p_ca_message, (void *)arg, sizeof (struct ca_msg))) {
+ result = -EFAULT;
+ goto free_mem_and_exit;
+ }
+
if (p_ca_message->msg) {
ca_message_header_len = p_ca_message->length; /* Restore it back when you are done */
@@ -434,7 +438,8 @@ static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message,
dprintk(verbose, DST_CA_DEBUG, 1, "Command = SEND_CA_PMT");
if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) { // code simplification started
dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT Failed !");
- return -1;
+ result = -1;
+ goto free_mem_and_exit;
}
dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT Success !");
break;
@@ -443,7 +448,8 @@ static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message,
/* Have to handle the 2 basic types of cards here */
if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {
dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT_REPLY Failed !");
- return -1;
+ result = -1;
+ goto free_mem_and_exit;
}
dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT_REPLY Success !");
break;
@@ -452,13 +458,17 @@ static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message,
if ((ca_get_app_info(state)) < 0) {
dprintk(verbose, DST_CA_ERROR, 1, " -->CA_APP_INFO_ENQUIRY Failed !");
- return -1;
+ result = -1;
+ goto free_mem_and_exit;
}
dprintk(verbose, DST_CA_INFO, 1, " -->CA_APP_INFO_ENQUIRY Success !");
break;
}
}
- return 0;
+free_mem_and_exit:
+ kfree (hw_buffer);
+
+ return result;
}
static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long ioctl_arg)
@@ -469,6 +479,7 @@ static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd
struct ca_caps *p_ca_caps;
struct ca_msg *p_ca_message;
void __user *arg = (void __user *)ioctl_arg;
+ int result = 0;
if ((p_ca_message = (struct ca_msg *) kmalloc(sizeof (struct ca_msg), GFP_KERNEL)) == NULL) {
dprintk(verbose, DST_CA_ERROR, 1, " Memory allocation failure");
@@ -488,14 +499,16 @@ static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd
dprintk(verbose, DST_CA_INFO, 1, " Sending message");
if ((ca_send_message(state, p_ca_message, arg)) < 0) {
dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SEND_MSG Failed !");
- return -1;
+ result = -1;
+ goto free_mem_and_exit;
}
break;
case CA_GET_MSG:
dprintk(verbose, DST_CA_INFO, 1, " Getting message");
if ((ca_get_message(state, p_ca_message, arg)) < 0) {
dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_MSG Failed !");
- return -1;
+ result = -1;
+ goto free_mem_and_exit;
}
dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_MSG Success !");
break;
@@ -508,7 +521,8 @@ static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd
dprintk(verbose, DST_CA_INFO, 1, " Getting Slot info");
if ((ca_get_slot_info(state, p_ca_slot_info, arg)) < 0) {
dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_SLOT_INFO Failed !");
- return -1;
+ result = -1;
+ goto free_mem_and_exit;
}
dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_SLOT_INFO Success !");
break;
@@ -516,7 +530,8 @@ static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd
dprintk(verbose, DST_CA_INFO, 1, " Getting Slot capabilities");
if ((ca_get_slot_caps(state, p_ca_caps, arg)) < 0) {
dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_CAP Failed !");
- return -1;
+ result = -1;
+ goto free_mem_and_exit;
}
dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_CAP Success !");
break;
@@ -524,7 +539,8 @@ static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd
dprintk(verbose, DST_CA_INFO, 1, " Getting descrambler description");
if ((ca_get_slot_descr(state, p_ca_message, arg)) < 0) {
dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_DESCR_INFO Failed !");
- return -1;
+ result = -1;
+ goto free_mem_and_exit;
}
dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_DESCR_INFO Success !");
break;
@@ -532,7 +548,8 @@ static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd
dprintk(verbose, DST_CA_INFO, 1, " Setting descrambler");
if ((ca_set_slot_descr()) < 0) {
dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_DESCR Failed !");
- return -1;
+ result = -1;
+ goto free_mem_and_exit;
}
dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_DESCR Success !");
break;
@@ -540,14 +557,19 @@ static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd
dprintk(verbose, DST_CA_INFO, 1, " Setting PID");
if ((ca_set_pid()) < 0) {
dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SET_PID Failed !");
- return -1;
+ result = -1;
+ goto free_mem_and_exit;
}
dprintk(verbose, DST_CA_INFO, 1, " -->CA_SET_PID Success !");
default:
- return -EOPNOTSUPP;
+ result = -EOPNOTSUPP;
};
+ free_mem_and_exit:
+ kfree (p_ca_message);
+ kfree (p_ca_slot_info);
+ kfree (p_ca_caps);
- return 0;
+ return result;
}
static int dst_ca_open(struct inode *inode, struct file *file)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 18:01:44 +0000