On 7/25/14, Benjamin Romer <benjamin.romer@xxxxxxxxxx> wrote:
> This patch cleans up the style, error handling, and string handling in the
> sysfs
> functions recently added to visorchipset:
Split your changes and send one logical change per patch
>
> - Use of sscanf() was changed to type-appropriate kstrto*() functions
> - error handling was simplified
> - the error return value of visorchannel_write() was corrected
> - switch use of driver-specific types to kernel types
>
> Signed-off-by: Benjamin Romer <benjamin.romer@xxxxxxxxxx>
> ---
> .../unisys/visorchipset/visorchipset_main.c | 123
> ++++++++++++---------
> .../staging/unisys/visorutil/memregion_direct.c | 2 +-
> 2 files changed, 69 insertions(+), 56 deletions(-)
>
> diff --git a/drivers/staging/unisys/visorchipset/visorchipset_main.c
> b/drivers/staging/unisys/visorchipset/visorchipset_main.c
> index 58a441d..6f87e27 100644
> --- a/drivers/staging/unisys/visorchipset/visorchipset_main.c
> +++ b/drivers/staging/unisys/visorchipset/visorchipset_main.c
> @@ -370,29 +370,31 @@ static void
> controlvm_respond_physdev_changestate(CONTROLVM_MESSAGE_HEADER *
> ssize_t toolaction_show(struct device *dev, struct device_attribute *attr,
> char *buf)
> {
> - U8 toolAction;
> + u8 toolAction;
>
> visorchannel_read(ControlVm_channel,
> offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
> - ToolAction), &toolAction, sizeof(U8));
> + ToolAction), &toolAction, sizeof(u8));
> return scnprintf(buf, PAGE_SIZE, "%u\n", toolAction);
> }
>
> ssize_t toolaction_store(struct device *dev, struct device_attribute
> *attr,
> const char *buf, size_t count)
> {
> - U8 toolAction;
> + u8 toolAction;
> + int ret;
>
> - if (sscanf(buf, "%hhu\n", &toolAction) == 1) {
> - if (visorchannel_write(ControlVm_channel,
> - offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
> - ToolAction),
> - &toolAction, sizeof(U8)) < 0)
> - return -EFAULT;
> - else
> - return count;
> - } else
> - return -EIO;
> + if (kstrtou8(buf, 10, &toolAction) != 0)
> + return -EINVAL;
> +
> + ret = visorchannel_write(ControlVm_channel,
> + offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL, ToolAction),
> + &toolAction, sizeof(u8));
> +
> + if (ret)
> + return ret;
> + else
> + return count;
> }
>
> ssize_t boottotool_show(struct device *dev, struct device_attribute *attr,
> @@ -411,21 +413,23 @@ ssize_t boottotool_show(struct device *dev, struct
> device_attribute *attr,
> ssize_t boottotool_store(struct device *dev, struct device_attribute
> *attr,
> const char *buf, size_t count)
> {
> - int val;
> + int val, ret;
> ULTRA_EFI_SPAR_INDICATION efiSparIndication;
>
> - if (sscanf(buf, "%u\n", &val) == 1) {
> - efiSparIndication.BootToTool = val;
> - if (visorchannel_write(ControlVm_channel,
> + if (kstrtoint(buf, 10, &val) != 0)
> + return -EINVAL;
> +
> + efiSparIndication.BootToTool = val;
> + ret = visorchannel_write(ControlVm_channel,
> offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
> - EfiSparIndication),
> + EfiSparIndication),
> &(efiSparIndication),
> - sizeof(ULTRA_EFI_SPAR_INDICATION)) < 0)
> - return -EFAULT;
> - else
> - return count;
> - } else
> - return -EIO;
> + sizeof(ULTRA_EFI_SPAR_INDICATION));
> +
> + if (ret)
> + return ret;
> + else
> + return count;
> }
>
> static ssize_t error_show(struct device *dev, struct device_attribute
> *attr,
> @@ -443,16 +447,19 @@ static ssize_t error_store(struct device *dev, struct
> device_attribute *attr,
> const char *buf, size_t count)
> {
> u32 error;
> + int ret;
>
> - if (sscanf(buf, "%i\n", &error) == 1) {
> - if (visorchannel_write(ControlVm_channel,
> + if (kstrtou32(buf, 10, &error) != 0)
> + return -EINVAL;
> +
> + ret = visorchannel_write(ControlVm_channel,
> offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
> InstallationError),
> - &error, sizeof(u32)) == 1) {
> - return count;
> - }
> - }
> - return -EIO;
> + &error, sizeof(u32));
> + if (ret)
> + return ret;
> + else
> + return count;
> }
>
> static ssize_t textid_show(struct device *dev, struct device_attribute
> *attr,
> @@ -470,16 +477,19 @@ static ssize_t textid_store(struct device *dev, struct
> device_attribute *attr,
> const char *buf, size_t count)
> {
> u32 textId;
> + int ret;
>
> - if (sscanf(buf, "%i\n", &textId) == 1) {
> - if (visorchannel_write(ControlVm_channel,
> + if (kstrtou32(buf, 10, &textId) != 0)
> + return -EINVAL;
> +
> + ret = visorchannel_write(ControlVm_channel,
> offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
> InstallationTextId),
> - &textId, sizeof(u32)) == 1) {
> - return count;
> - }
> - }
> - return -EIO;
> + &textId, sizeof(u32));
> + if (ret)
> + return ret;
> + else
> + return count;
> }
>
>
> @@ -500,16 +510,19 @@ static ssize_t remaining_steps_store(struct device
> *dev,
> struct device_attribute *attr, const char *buf, size_t count)
> {
> u16 remainingSteps;
> + int ret;
>
> - if (sscanf(buf, "%hu\n", &remainingSteps) == 1) {
> - if (visorchannel_write(ControlVm_channel,
> + if (kstrtou16(buf, 10, &remainingSteps) != 0)
> + return -EINVAL;
> +
> + ret = visorchannel_write(ControlVm_channel,
> offsetof(ULTRA_CONTROLVM_CHANNEL_PROTOCOL,
> InstallationRemainingSteps),
> - &remainingSteps, sizeof(u16)) == 1) {
> - return count;
> - }
> - }
> - return -EIO;
> + &remainingSteps, sizeof(u16));
> + if (ret)
> + return ret;
> + else
> + return count;
> }
>
> static void
> @@ -2383,17 +2396,17 @@ static ssize_t chipsetready_store(struct device
> *dev,
> {
> char msgtype[64];
>
> - if (sscanf(buf, "%63s", msgtype) == 1) {
> - if (strcmp(msgtype, "CALLHOMEDISK_MOUNTED") == 0)
> - chipset_events[0] = 1;
> - else if (strcmp(msgtype, "MODULES_LOADED") == 0)
> - chipset_events[1] = 1;
> - else
> - return -EINVAL;
> - } else {
> + if (sscanf(buf, "%63s", msgtype) != 1)
> + return -EINVAL;
> +
> + if (strcmp(msgtype, "CALLHOMEDISK_MOUNTED") == 0) {
> + chipset_events[0] = 1;
> + return count;
> + } else if (strcmp(msgtype, "MODULES_LOADED") == 0) {
> + chipset_events[1] = 1;
> + return count;
> + } else
> return -EINVAL;
> - }
> - return count;
> }
>
> static ssize_t
> diff --git a/drivers/staging/unisys/visorutil/memregion_direct.c
> b/drivers/staging/unisys/visorutil/memregion_direct.c
> index 28dfba0..65bc07b 100644
> --- a/drivers/staging/unisys/visorutil/memregion_direct.c
> +++ b/drivers/staging/unisys/visorutil/memregion_direct.c
> @@ -184,7 +184,7 @@ memregion_readwrite(BOOL is_write,
> {
> if (offset + nbytes > memregion->nbytes) {
> ERRDRV("memregion_readwrite offset out of range!!");
> - return -EFAULT;
> + return -EIO;
> }
> if (is_write)
> memcpy_toio(memregion->mapped + offset, local, nbytes);
> --
> 1.9.1
>
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> http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
>
--
Regards,
Denis
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