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media: firewire: Fix app_info parameter type in avc_ca{,_app}_info

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Clang warns:

drivers/media/firewire/firedtv-avc.c:999:45: warning: implicit
conversion from 'int' to 'char' changes value from 159 to -97
[-Wconstant-conversion]
        app_info[0] = (EN50221_TAG_APP_INFO >> 16) & 0xff;
                    ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
drivers/media/firewire/firedtv-avc.c:1000:45: warning: implicit
conversion from 'int' to 'char' changes value from 128 to -128
[-Wconstant-conversion]
        app_info[1] = (EN50221_TAG_APP_INFO >>  8) & 0xff;
                    ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
drivers/media/firewire/firedtv-avc.c:1040:44: warning: implicit
conversion from 'int' to 'char' changes value from 159 to -97
[-Wconstant-conversion]
        app_info[0] = (EN50221_TAG_CA_INFO >> 16) & 0xff;
                    ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
drivers/media/firewire/firedtv-avc.c:1041:44: warning: implicit
conversion from 'int' to 'char' changes value from 128 to -128
[-Wconstant-conversion]
        app_info[1] = (EN50221_TAG_CA_INFO >>  8) & 0xff;
                    ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
4 warnings generated.

Change app_info's type to unsigned char to match the type of the
member msg in struct ca_msg, which is the only thing passed into the
app_info parameter in this function.

Link: https://github.com/ClangBuiltLinux/linux/issues/105

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Nathan Chancellor 2018-10-18 16:03:06 -04:00 committed by Mauro Carvalho Chehab
parent 3cd6954c9b
commit b2e9a4eda1
2 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/media/firewire/firedtv-avc.c
View File

@ -968,7 +968,8 @@ static int get_ca_object_length(struct avc_response_frame *r)
return r->operand[7];
}
int avc_ca_app_info(struct firedtv *fdtv, char *app_info, unsigned int *len)
int avc_ca_app_info(struct firedtv *fdtv, unsigned char *app_info,
unsigned int *len)
{
struct avc_command_frame *c = (void *)fdtv->avc_data;
struct avc_response_frame *r = (void *)fdtv->avc_data;
@ -1009,7 +1010,8 @@ out:
return ret;
}
int avc_ca_info(struct firedtv *fdtv, char *app_info, unsigned int *len)
int avc_ca_info(struct firedtv *fdtv, unsigned char *app_info,
unsigned int *len)
{
struct avc_command_frame *c = (void *)fdtv->avc_data;
struct avc_response_frame *r = (void *)fdtv->avc_data;

6
drivers/media/firewire/firedtv.h
View File

@ -124,8 +124,10 @@ int avc_lnb_control(struct firedtv *fdtv, char voltage, char burst,
struct dvb_diseqc_master_cmd *diseqcmd);
void avc_remote_ctrl_work(struct work_struct *work);
int avc_register_remote_control(struct firedtv *fdtv);
int avc_ca_app_info(struct firedtv *fdtv, char *app_info, unsigned int *len);
int avc_ca_info(struct firedtv *fdtv, char *app_info, unsigned int *len);
int avc_ca_app_info(struct firedtv *fdtv, unsigned char *app_info,
unsigned int *len);
int avc_ca_info(struct firedtv *fdtv, unsigned char *app_info,
unsigned int *len);
int avc_ca_reset(struct firedtv *fdtv);
int avc_ca_pmt(struct firedtv *fdtv, char *app_info, int length);
int avc_ca_get_time_date(struct firedtv *fdtv, int *interval);