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Date:   Thu, 7 Feb 2019 11:17:39 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     Jens Axboe <axboe@...nel.dk>,
        "Manoj N. Kumar" <manoj@...ux.ibm.com>,
        "Matthew R. Ochs" <mrochs@...ux.ibm.com>,
        Uma Krishnan <ukrishn@...ux.ibm.com>,
        Brian King <brking@...ibm.com>,
        Adaptec OEM Raid Solutions <aacraid@...rosemi.com>,
        Marc Gonzalez <marc.w.gonzalez@...e.fr>,
        linux-ide@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        linux-scsi@...r.kernel.org, esc.storagedev@...rosemi.com,
        Nathan Chancellor <natechancellor@...il.com>,
        Bradley Grove <bgrove@...otech.com>,
        Don Brace <don.brace@...rosemi.com>,
        Bart Van Assche <bvanassche@....org>
Subject: Re: [PATCH v5] scsi/ata: Use unsigned int for cmd's type in ioctls in scsi_host_template

On Thu, Feb 7, 2019 at 8:09 AM Nathan Chancellor
<natechancellor@...il.com> 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 fit into type 'int', which is used for the cmd parameter 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 a negative value for
> any command, 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@...il.com>
> Acked-by: Bradley Grove <bgrove@...otech.com>
> Acked-by: Don Brace <don.brace@...rosemi.com>
> Reviewed-by: Bart Van Assche <bvanassche@....org>
> Tested-by: Nick Desaulniers <ndesaulniers@...gle.com>

Thanks for resending with the collected tags and small fixups.

James or Martin, can you please pick this up?

> ---
>
> v4 -> v5:
>
> * Collect tags.
> * Fix mispellings in the commit message, thanks to Marc Gonzalez for the
>   review.
>
> v3 -> v4:
>
> * Repost with Bart's suggested change and his reviewed by.
>
> 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).
>
>  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    | 16 +++++++---------
>  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, 54 insertions(+), 44 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 e977b459f823..a45f81ec80ce 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/main.c b/drivers/scsi/cxlflash/main.c
> index c8bad2c093b8..7096810fd222 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..3d130523c288 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;
> @@ -1292,9 +1292,8 @@ 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, "
> -                          "address %p", cmd,
> -                          arg);
> +                          "ioctl_handler access_ok failed for cmd %u, address %p",
> +                          cmd, arg);
>                 return PTR_ERR(ioctl);
>         }
>
> @@ -1493,7 +1492,7 @@ 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 +1517,8 @@ 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 +1529,7 @@ 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 5284444fdd10..f044e7d10d63 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 d4aede324e84..3eb47207c7b0 100644
> --- a/drivers/scsi/scsi_debug.c
> +++ b/drivers/scsi/scsi_debug.c
> @@ -832,7 +832,8 @@ 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 f564af8949e8..5d9ccbab7581 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 857086cf7ebf..56b2dba7d911 100644
> --- a/include/scsi/libsas.h
> +++ b/include/scsi/libsas.h
> @@ -707,7 +707,8 @@ 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
>


-- 
Thanks,
~Nick Desaulniers

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