Re: [PATCH v2] scsi/ata: Use unsigned int for cmd's type in ioctls in scsi_host_template

From: Nathan Chancellor
Date: Mon Dec 17 2018 - 12:32:06 EST

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On Fri, Oct 19, 2018 at 10:01:44PM -0700, Nathan Chancellor wrote:
> 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>
> ---
>
> v1 -> 2:
>
> * Fix build breakage in cxlflash driver from forgetting to update
> prototype (thanks to 0day for catching it).
>
> 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/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 ++++--
> 18 files changed, 52 insertions(+), 41 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 bd7f352c28f3..a6399fac3333 100644
> --- a/drivers/scsi/aacraid/aachba.c
> +++ b/drivers/scsi/aacraid/aachba.c
> @@ -3452,7 +3452,7 @@ 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 39eb415987fc..1965072ab673 100644
> --- a/drivers/scsi/aacraid/aacraid.h
> +++ b/drivers/scsi/aacraid/aacraid.h
> @@ -2705,12 +2705,12 @@ 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 25f6600d6c09..fd8a10871598 100644
> --- a/drivers/scsi/aacraid/commctrl.c
> +++ b/drivers/scsi/aacraid/commctrl.c
> @@ -1061,7 +1061,7 @@ 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 2d4e4ddc5ace..cd2efb44f62c 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))
> @@ -1205,7 +1206,8 @@ 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/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 c07118617d89..25dc8d44ed8e 100644
> --- a/drivers/scsi/esas2r/esas2r_main.c
> +++ b/drivers/scsi/esas2r/esas2r_main.c
> @@ -624,7 +624,7 @@ 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 c9cccf35e9d7..c9d41d3b50f1 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
>
> @@ -6123,7 +6124,7 @@ 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 =
> @@ -6160,7 +6161,7 @@ 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;
> @@ -6197,7 +6198,8 @@ 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:
> @@ -6517,7 +6519,8 @@ 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 271990bc065b..97fcc881f9f1 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 33229348dcb6..4eeaafbe0504 100644
> --- a/drivers/scsi/libsas/sas_scsi_host.c
> +++ b/drivers/scsi/libsas/sas_scsi_host.c
> @@ -805,7 +805,7 @@ 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 60bcc6df97a9..4c513651c95f 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 a25a07a0b7f0..498bdfbbebfa 100644
> --- a/drivers/scsi/smartpqi/smartpqi_init.c
> +++ b/drivers/scsi/smartpqi/smartpqi_init.c
> @@ -5572,7 +5572,8 @@ 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 38c95d66ab12..263ca4f05c24 100644
> --- a/include/linux/libata.h
> +++ b/include/linux/libata.h
> @@ -1123,10 +1123,11 @@ 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 5ea06d310a25..5c1df26e1d4f 100644
> --- a/include/scsi/scsi_host.h
> +++ b/include/scsi/scsi_host.h
> @@ -65,7 +65,8 @@ 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
> @@ -75,7 +76,8 @@ 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
>
> /*
> --
> 2.19.1
>

Gentle ping for review, it would be nice to get this into 4.21/5.0 since
I sent it out almost two months ago.

Nathan

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