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ipmi: msghandler: Fix a signedness bug 

The type for the completion codes should be unsigned char instead of
char.  If it is declared as a normal char then the conditions in
__get_device_id() are impossible because the IPMI_DEVICE_IN_FW_UPDATE_ERR
error codes are higher than 127.

    drivers/char/ipmi/ipmi_msghandler.c:2449 __get_device_id()
    warn: impossible condition '(bmc->cc == 209) => ((-128)-127 == 209)'

Fixes: f8910ffa81 ("ipmi:msghandler: retry to get device id on an error")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Message-Id: <20200918142756.GB909725@mwanda>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
This commit is contained in:
Dan Carpenter 2020-09-18 17:27:56 +03:00 committed by Corey Minyard
parent 42d8a346c5
commit c011410d91
2 changed files with 2 additions and 2 deletions
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2
drivers/char/ipmi/ipmi_msghandler.c
View File

@ -319,7 +319,7 @@ struct bmc_device {
int dyn_guid_set;
struct kref usecount;
struct work_struct remove_work;
char cc; /* completion code */
unsigned char cc; /* completion code */
};
#define to_bmc_device(x) container_of((x), struct bmc_device, pdev.dev)

2
drivers/char/ipmi/ipmi_si_intf.c
View File

@ -1344,7 +1344,7 @@ static int try_get_dev_id(struct smi_info *smi_info)
resp + 2, resp_len - 2, &smi_info->device_id);
if (rv) {
/* record completion code */
char cc = *(resp + 2);
unsigned char cc = *(resp + 2);
if ((cc == IPMI_DEVICE_IN_FW_UPDATE_ERR
|| cc == IPMI_DEVICE_IN_INIT_ERR