Clang warns several times in the scsi subsystem (trimmed for brevity):
drivers/scsi/hpsa.c:6209:7: warning: overflow converting case value to
switch condition type (2147762695 to 18446744071562347015) [-Wswitch]
case CCISS_GETBUSTYPES:
^
drivers/scsi/hpsa.c:6208:7: warning: overflow converting case value to
switch condition type (2147762694 to 18446744071562347014) [-Wswitch]
case CCISS_GETHEARTBEAT:
^
The root cause is that the _IOC macro can generate really large numbers,
which don't find into type 'int', which is used for the cmd paremeter in
the ioctls in scsi_host_template. My research into how GCC and Clang are
handling this at a low level didn't prove fruitful. However, looking at
the rest of the kernel tree, all ioctls use an 'unsigned int' for the
cmd parameter, which will fit all of the _IOC values in the scsi/ata
subsystems.
Make that change because none of the ioctls expect to take a negative
value, it brings the ioctls inline with the reset of the kernel, and it
removes ambiguity, which is never good when dealing with compilers.
Link: https://github.com/ClangBuiltLinux/linux/issues/85
Link: https://github.com/ClangBuiltLinux/linux/issues/154
Link: https://github.com/ClangBuiltLinux/linux/issues/157
Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
---
v2 -> v3:
* Fix another -Wswitch warning from drivers/scsi/cxlflash/main.c, coming
from decode_hioctl (uncovered via a powernv_defconfig build).
v1 -> v2:
* Fix build breakage in cxlflash driver from forgetting to update
prototype (thanks to 0day for catching it).
I would appreciate some review so I could get this accepted...
drivers/ata/libata-scsi.c | 5 +++--
drivers/scsi/aacraid/aachba.c | 2 +-
drivers/scsi/aacraid/aacraid.h | 4 ++--
drivers/scsi/aacraid/commctrl.c | 2 +-
drivers/scsi/aacraid/linit.c | 6 ++++--
drivers/scsi/cxlflash/common.h | 3 ++-
drivers/scsi/cxlflash/main.c | 2 +-
drivers/scsi/cxlflash/superpipe.c | 12 +++++-------
drivers/scsi/esas2r/esas2r.h | 4 ++--
drivers/scsi/esas2r/esas2r_ioctl.c | 13 ++++++-------
drivers/scsi/esas2r/esas2r_main.c | 2 +-
drivers/scsi/hpsa.c | 15 +++++++++------
drivers/scsi/ipr.c | 3 ++-
drivers/scsi/libsas/sas_scsi_host.c | 2 +-
drivers/scsi/scsi_debug.c | 3 ++-
drivers/scsi/smartpqi/smartpqi_init.c | 3 ++-
include/linux/libata.h | 5 +++--
include/scsi/libsas.h | 3 ++-
include/scsi/scsi_host.h | 6 ++++--
19 files changed, 53 insertions(+), 42 deletions(-)
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 3d4887d0e84a..6291f1dbf342 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -778,7 +778,7 @@ static int ata_ioc32(struct ata_port *ap)
}
int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
- int cmd, void __user *arg)
+ unsigned int cmd, void __user *arg)
{
unsigned long val;
int rc = -EINVAL;
@@ -829,7 +829,8 @@ int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
}
EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
-int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
+int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd,
+ void __user *arg)
{
return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
scsidev, cmd, arg);
diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index 75ab5ff6b78c..6085aa087a2f 100644
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -3455,7 +3455,7 @@ static int delete_disk(struct aac_dev *dev, void __user *arg)
}
}
-int aac_dev_ioctl(struct aac_dev *dev, int cmd, void __user *arg)
+int aac_dev_ioctl(struct aac_dev *dev, unsigned int cmd, void __user *arg)
{
switch (cmd) {
case FSACTL_QUERY_DISK:
diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h
index 3291d1c16864..1df5171594b8 100644
--- a/drivers/scsi/aacraid/aacraid.h
+++ b/drivers/scsi/aacraid/aacraid.h
@@ -2706,12 +2706,12 @@ void aac_set_intx_mode(struct aac_dev *dev);
int aac_get_config_status(struct aac_dev *dev, int commit_flag);
int aac_get_containers(struct aac_dev *dev);
int aac_scsi_cmd(struct scsi_cmnd *cmd);
-int aac_dev_ioctl(struct aac_dev *dev, int cmd, void __user *arg);
+int aac_dev_ioctl(struct aac_dev *dev, unsigned int cmd, void __user *arg);
#ifndef shost_to_class
#define shost_to_class(shost) &shost->shost_dev
#endif
ssize_t aac_get_serial_number(struct device *dev, char *buf);
-int aac_do_ioctl(struct aac_dev * dev, int cmd, void __user *arg);
+int aac_do_ioctl(struct aac_dev *dev, unsigned int cmd, void __user *arg);
int aac_rx_init(struct aac_dev *dev);
int aac_rkt_init(struct aac_dev *dev);
int aac_nark_init(struct aac_dev *dev);
diff --git a/drivers/scsi/aacraid/commctrl.c b/drivers/scsi/aacraid/commctrl.c
index e2899ff7913e..f0ff40332753 100644
--- a/drivers/scsi/aacraid/commctrl.c
+++ b/drivers/scsi/aacraid/commctrl.c
@@ -1060,7 +1060,7 @@ static int aac_send_reset_adapter(struct aac_dev *dev, void __user *arg)
return retval;
}
-int aac_do_ioctl(struct aac_dev * dev, int cmd, void __user *arg)
+int aac_do_ioctl(struct aac_dev *dev, unsigned int cmd, void __user *arg)
{
int status;
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 634ddb90e7aa..17bcad701cf0 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -616,7 +616,8 @@ static struct device_attribute *aac_dev_attrs[] = {
NULL,
};
-static int aac_ioctl(struct scsi_device *sdev, int cmd, void __user * arg)
+static int aac_ioctl(struct scsi_device *sdev, unsigned int cmd,
+ void __user *arg)
{
struct aac_dev *dev = (struct aac_dev *)sdev->host->hostdata;
if (!capable(CAP_SYS_RAWIO))
@@ -1206,7 +1207,8 @@ static long aac_compat_do_ioctl(struct aac_dev *dev, unsigned cmd, unsigned long
return ret;
}
-static int aac_compat_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
+static int aac_compat_ioctl(struct scsi_device *sdev, unsigned int cmd,
+ void __user *arg)
{
struct aac_dev *dev = (struct aac_dev *)sdev->host->hostdata;
if (!capable(CAP_SYS_RAWIO))
diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h
index 8908a20065c8..4d90106fcb37 100644
--- a/drivers/scsi/cxlflash/common.h
+++ b/drivers/scsi/cxlflash/common.h
@@ -334,7 +334,8 @@ int cxlflash_afu_sync(struct afu *afu, ctx_hndl_t c, res_hndl_t r, u8 mode);
void cxlflash_list_init(void);
void cxlflash_term_global_luns(void);
void cxlflash_free_errpage(void);
-int cxlflash_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
+int cxlflash_ioctl(struct scsi_device *sdev, unsigned int cmd,
+ void __user *arg);
void cxlflash_stop_term_user_contexts(struct cxlflash_cfg *cfg);
int cxlflash_mark_contexts_error(struct cxlflash_cfg *cfg);
void cxlflash_term_local_luns(struct cxlflash_cfg *cfg);
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index bfa13e3b191c..a0ea2dea7518 100644
--- a/drivers/scsi/cxlflash/main.c
+++ b/drivers/scsi/cxlflash/main.c
@@ -3282,7 +3282,7 @@ static int cxlflash_chr_open(struct inode *inode, struct file *file)
*
* Return: A string identifying the decoded host ioctl.
*/
-static char *decode_hioctl(int cmd)
+static char *decode_hioctl(unsigned int cmd)
{
switch (cmd) {
case HT_CXLFLASH_LUN_PROVISION:
diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c
index acac6152f50b..1a94a469051e 100644
--- a/drivers/scsi/cxlflash/superpipe.c
+++ b/drivers/scsi/cxlflash/superpipe.c
@@ -1924,7 +1924,7 @@ static int cxlflash_disk_verify(struct scsi_device *sdev,
*
* Return: A string identifying the decoded ioctl.
*/
-static char *decode_ioctl(int cmd)
+static char *decode_ioctl(unsigned int cmd)
{
switch (cmd) {
case DK_CXLFLASH_ATTACH:
@@ -2051,7 +2051,7 @@ static int cxlflash_disk_direct_open(struct scsi_device *sdev, void *arg)
*
* Return: 0 on success, -errno on failure
*/
-static int ioctl_common(struct scsi_device *sdev, int cmd)
+static int ioctl_common(struct scsi_device *sdev, unsigned int cmd)
{
struct cxlflash_cfg *cfg = shost_priv(sdev->host);
struct device *dev = &cfg->dev->dev;
@@ -2096,7 +2096,7 @@ static int ioctl_common(struct scsi_device *sdev, int cmd)
*
* Return: 0 on success, -errno on failure
*/
-int cxlflash_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
+int cxlflash_ioctl(struct scsi_device *sdev, unsigned int cmd, void __user *arg)
{
typedef int (*sioctl) (struct scsi_device *, void *);
@@ -2179,8 +2179,7 @@ int cxlflash_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
}
if (unlikely(copy_from_user(&buf, arg, size))) {
- dev_err(dev, "%s: copy_from_user() fail "
- "size=%lu cmd=%d (%s) arg=%p\n",
+ dev_err(dev, "%s: copy_from_user() fail size=%lu cmd=%u (%s) arg=%p\n",
__func__, size, cmd, decode_ioctl(cmd), arg);
rc = -EFAULT;
goto cxlflash_ioctl_exit;
@@ -2203,8 +2202,7 @@ int cxlflash_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
rc = do_ioctl(sdev, (void *)&buf);
if (likely(!rc))
if (unlikely(copy_to_user(arg, &buf, size))) {
- dev_err(dev, "%s: copy_to_user() fail "
- "size=%lu cmd=%d (%s) arg=%p\n",
+ dev_err(dev, "%s: copy_to_user() fail size=%lu cmd=%u (%s) arg=%p\n",
__func__, size, cmd, decode_ioctl(cmd), arg);
rc = -EFAULT;
}
diff --git a/drivers/scsi/esas2r/esas2r.h b/drivers/scsi/esas2r/esas2r.h
index 858c3b33db78..7f43b95f4e94 100644
--- a/drivers/scsi/esas2r/esas2r.h
+++ b/drivers/scsi/esas2r/esas2r.h
@@ -965,8 +965,8 @@ struct esas2r_adapter {
const char *esas2r_info(struct Scsi_Host *);
int esas2r_write_params(struct esas2r_adapter *a, struct esas2r_request *rq,
struct esas2r_sas_nvram *data);
-int esas2r_ioctl_handler(void *hostdata, int cmd, void __user *arg);
-int esas2r_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
+int esas2r_ioctl_handler(void *hostdata, unsigned int cmd, void __user *arg);
+int esas2r_ioctl(struct scsi_device *dev, unsigned int cmd, void __user *arg);
u8 handle_hba_ioctl(struct esas2r_adapter *a,
struct atto_ioctl *ioctl_hba);
int esas2r_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd);
diff --git a/drivers/scsi/esas2r/esas2r_ioctl.c b/drivers/scsi/esas2r/esas2r_ioctl.c
index 34bcc8c04ff4..916b9adf4921 100644
--- a/drivers/scsi/esas2r/esas2r_ioctl.c
+++ b/drivers/scsi/esas2r/esas2r_ioctl.c
@@ -1274,7 +1274,7 @@ int esas2r_write_params(struct esas2r_adapter *a, struct esas2r_request *rq,
/* This function only cares about ATTO-specific ioctls (atto_express_ioctl) */
-int esas2r_ioctl_handler(void *hostdata, int cmd, void __user *arg)
+int esas2r_ioctl_handler(void *hostdata, unsigned int cmd, void __user *arg)
{
struct atto_express_ioctl *ioctl = NULL;
struct esas2r_adapter *a;
@@ -1292,7 +1292,7 @@ int esas2r_ioctl_handler(void *hostdata, int cmd, void __user *arg)
ioctl = memdup_user(arg, sizeof(struct atto_express_ioctl));
if (IS_ERR(ioctl)) {
esas2r_log(ESAS2R_LOG_WARN,
- "ioctl_handler access_ok failed for cmd %d, "
+ "ioctl_handler access_ok failed for cmd %u, "
"address %p", cmd,
arg);
return PTR_ERR(ioctl);
@@ -1493,7 +1493,7 @@ int esas2r_ioctl_handler(void *hostdata, int cmd, void __user *arg)
ioctl_done:
if (err < 0) {
- esas2r_log(ESAS2R_LOG_WARN, "err %d on ioctl cmd %d", err,
+ esas2r_log(ESAS2R_LOG_WARN, "err %d on ioctl cmd %u", err,
cmd);
switch (err) {
@@ -1518,9 +1518,8 @@ int esas2r_ioctl_handler(void *hostdata, int cmd, void __user *arg)
err = __copy_to_user(arg, ioctl, sizeof(struct atto_express_ioctl));
if (err != 0) {
esas2r_log(ESAS2R_LOG_WARN,
- "ioctl_handler copy_to_user didn't copy "
- "everything (err %d, cmd %d)", err,
- cmd);
+ "ioctl_handler copy_to_user didn't copy everything (err %d, cmd %u)",
+ err, cmd);
kfree(ioctl);
return -EFAULT;
@@ -1531,7 +1530,7 @@ int esas2r_ioctl_handler(void *hostdata, int cmd, void __user *arg)
return 0;
}
-int esas2r_ioctl(struct scsi_device *sd, int cmd, void __user *arg)
+int esas2r_ioctl(struct scsi_device *sd, unsigned int cmd, void __user *arg)
{
return esas2r_ioctl_handler(sd->host->hostdata, cmd, arg);
}
diff --git a/drivers/scsi/esas2r/esas2r_main.c b/drivers/scsi/esas2r/esas2r_main.c
index 64397d441bae..fdbda5c05aa0 100644
--- a/drivers/scsi/esas2r/esas2r_main.c
+++ b/drivers/scsi/esas2r/esas2r_main.c
@@ -623,7 +623,7 @@ static int esas2r_proc_major;
long esas2r_proc_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
{
return esas2r_ioctl_handler(esas2r_proc_host->hostdata,
- (int)cmd, (void __user *)arg);
+ cmd, (void __user *)arg);
}
static void __exit esas2r_exit(void)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index ff67ef5d5347..28cfd3d01c5a 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -251,10 +251,11 @@ static int number_of_controllers;
static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
-static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
+static int hpsa_ioctl(struct scsi_device *dev, unsigned int cmd,
+ void __user *arg);
#ifdef CONFIG_COMPAT
-static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd,
+static int hpsa_compat_ioctl(struct scsi_device *dev, unsigned int cmd,
void __user *arg);
#endif
@@ -6127,7 +6128,7 @@ static void cmd_free(struct ctlr_info *h, struct CommandList *c)
#ifdef CONFIG_COMPAT
-static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd,
+static int hpsa_ioctl32_passthru(struct scsi_device *dev, unsigned int cmd,
void __user *arg)
{
IOCTL32_Command_struct __user *arg32 =
@@ -6164,7 +6165,7 @@ static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd,
}
static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
- int cmd, void __user *arg)
+ unsigned int cmd, void __user *arg)
{
BIG_IOCTL32_Command_struct __user *arg32 =
(BIG_IOCTL32_Command_struct __user *) arg;
@@ -6201,7 +6202,8 @@ static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
return err;
}
-static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
+static int hpsa_compat_ioctl(struct scsi_device *dev, unsigned int cmd,
+ void __user *arg)
{
switch (cmd) {
case CCISS_GETPCIINFO:
@@ -6521,7 +6523,8 @@ static void check_ioctl_unit_attention(struct ctlr_info *h,
/*
* ioctl
*/
-static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
+static int hpsa_ioctl(struct scsi_device *dev, unsigned int cmd,
+ void __user *arg)
{
struct ctlr_info *h;
void __user *argp = (void __user *)arg;
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index d1b4025a4503..6d053e220153 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -6696,7 +6696,8 @@ static int ipr_queuecommand(struct Scsi_Host *shost,
* Return value:
* 0 on success / other on failure
**/
-static int ipr_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
+static int ipr_ioctl(struct scsi_device *sdev, unsigned int cmd,
+ void __user *arg)
{
struct ipr_resource_entry *res;
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index c43a00a9d819..b775445892af 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -799,7 +799,7 @@ void sas_scsi_recover_host(struct Scsi_Host *shost)
shost->host_failed, tries);
}
-int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
+int sas_ioctl(struct scsi_device *sdev, unsigned int cmd, void __user *arg)
{
struct domain_device *dev = sdev_to_domain_dev(sdev);
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 661512bec3ac..e0f949b7d947 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -836,7 +836,8 @@ static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
}
-static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
+static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
+ void __user *arg)
{
if (sdebug_verbose) {
if (0x1261 == cmd)
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index 40f58238ce4a..8baaf35da935 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -6043,7 +6043,8 @@ static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
return rc;
}
-static int pqi_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
+static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd,
+ void __user *arg)
{
int rc;
struct pqi_ctrl_info *ctrl_info;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 68133842e6d7..c9419c05a90a 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1122,10 +1122,11 @@ extern int ata_host_activate(struct ata_host *host, int irq,
extern void ata_host_detach(struct ata_host *host);
extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
extern int ata_scsi_detect(struct scsi_host_template *sht);
-extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
+extern int ata_scsi_ioctl(struct scsi_device *dev, unsigned int cmd,
+ void __user *arg);
extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
- int cmd, void __user *arg);
+ unsigned int cmd, void __user *arg);
extern void ata_sas_port_destroy(struct ata_port *);
extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
struct ata_port_info *, struct Scsi_Host *);
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index 3de3b10da19a..70461264d6e7 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -709,7 +709,8 @@ int sas_eh_target_reset_handler(struct scsi_cmnd *cmd);
extern void sas_target_destroy(struct scsi_target *);
extern int sas_slave_alloc(struct scsi_device *);
-extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
+extern int sas_ioctl(struct scsi_device *sdev, unsigned int cmd,
+ void __user *arg);
extern int sas_drain_work(struct sas_ha_struct *ha);
extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 6ca954e9f752..4047d68d1b08 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -60,7 +60,8 @@ struct scsi_host_template {
*
* Status: OPTIONAL
*/
- int (* ioctl)(struct scsi_device *dev, int cmd, void __user *arg);
+ int (*ioctl)(struct scsi_device *dev, unsigned int cmd,
+ void __user *arg);
#ifdef CONFIG_COMPAT
@@ -70,7 +71,8 @@ struct scsi_host_template {
*
* Status: OPTIONAL
*/
- int (* compat_ioctl)(struct scsi_device *dev, int cmd, void __user *arg);
+ int (*compat_ioctl)(struct scsi_device *dev, unsigned int cmd,
+ void __user *arg);
#endif
/*
--
2.20.1
