| Message ID | 1529027312-56770-1-git-send-email-jiazhouyang09@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
Hi,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on xen-tip/linux-next]
[also build test WARNING on v4.17 next-20180614]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/linux-kernel-owner-vger-kernel-org/scsi-xen-scsifront-add-error-handling-for-xenbus_printf/20180615-094919
base: https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
drivers/scsi/xen-scsifront.c:267:21: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:440:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:440:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:473:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:473:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:474:33: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:474:33: sparse: expression using sizeof(void)
>> drivers/scsi/xen-scsifront.c:663:43: sparse: incorrect type in argument 1 (different base types) @@ expected struct xenbus_device *dev @@ got sstruct xenbus_device *dev @@
drivers/scsi/xen-scsifront.c:663:43: expected struct xenbus_device *dev
drivers/scsi/xen-scsifront.c:663:43: got struct xenbus_device **<noident>
drivers/scsi/xen-scsifront.c:681:43: sparse: incorrect type in argument 1 (different base types) @@ expected struct xenbus_device *dev @@ got sstruct xenbus_device *dev @@
drivers/scsi/xen-scsifront.c:681:43: expected struct xenbus_device *dev
drivers/scsi/xen-scsifront.c:681:43: got struct xenbus_device **<noident>
drivers/scsi/xen-scsifront.c:1063:19: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:1064:19: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c:1065:19: sparse: expression using sizeof(void)
drivers/scsi/xen-scsifront.c: In function 'scsifront_sdev_configure':
drivers/scsi/xen-scsifront.c:663:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct xenbus_device **'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
drivers/scsi/xen-scsifront.c: In function 'scsifront_sdev_destroy':
drivers/scsi/xen-scsifront.c:681:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev, err,
^
In file included from drivers/scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct xenbus_device **'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +663 drivers/scsi/xen-scsifront.c
653
654 static int scsifront_sdev_configure(struct scsi_device *sdev)
655 {
656 struct vscsifrnt_info *info = shost_priv(sdev->host);
657 int err;
658
659 if (info && current == info->curr) {
660 err = xenbus_printf(XBT_NIL, info->dev->nodename,
661 info->dev_state_path, "%d", XenbusStateConnected);
662 if (err) {
> 663 xenbus_dev_error(&info->dev, err,
664 "%s: writing dev_state_path", __func__);
665 return err;
666 }
667 }
668
669 return 0;
670 }
671
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
Hi,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on xen-tip/linux-next]
[also build test ERROR on v4.17 next-20180615]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/linux-kernel-owner-vger-kernel-org/scsi-xen-scsifront-add-error-handling-for-xenbus_printf/20180615-094919
base: https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
config: x86_64-fedora-25 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All errors (new ones prefixed by >>):
drivers//scsi/xen-scsifront.c: In function 'scsifront_sdev_configure':
>> drivers//scsi/xen-scsifront.c:663:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev, err,
^
In file included from drivers//scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct xenbus_device **'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
drivers//scsi/xen-scsifront.c: In function 'scsifront_sdev_destroy':
drivers//scsi/xen-scsifront.c:681:21: error: passing argument 1 of 'xenbus_dev_error' from incompatible pointer type [-Werror=incompatible-pointer-types]
xenbus_dev_error(&info->dev, err,
^
In file included from drivers//scsi/xen-scsifront.c:50:0:
include/xen/xenbus.h:224:6: note: expected 'struct xenbus_device *' but argument is of type 'struct xenbus_device **'
void xenbus_dev_error(struct xenbus_device *dev, int err, const char *fmt, ...);
^~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/xenbus_dev_error +663 drivers//scsi/xen-scsifront.c
653
654 static int scsifront_sdev_configure(struct scsi_device *sdev)
655 {
656 struct vscsifrnt_info *info = shost_priv(sdev->host);
657 int err;
658
659 if (info && current == info->curr) {
660 err = xenbus_printf(XBT_NIL, info->dev->nodename,
661 info->dev_state_path, "%d", XenbusStateConnected);
662 if (err) {
> 663 xenbus_dev_error(&info->dev, err,
664 "%s: writing dev_state_path", __func__);
665 return err;
666 }
667 }
668
669 return 0;
670 }
671
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c index 36f59a1..be576cb 100644 --- a/drivers/scsi/xen-scsifront.c +++ b/drivers/scsi/xen-scsifront.c @@ -654,10 +654,17 @@ static int scsifront_dev_reset_handler(struct scsi_cmnd *sc) static int scsifront_sdev_configure(struct scsi_device *sdev) { struct vscsifrnt_info *info = shost_priv(sdev->host); + int err; - if (info && current == info->curr) - xenbus_printf(XBT_NIL, info->dev->nodename, + if (info && current == info->curr) { + err = xenbus_printf(XBT_NIL, info->dev->nodename, info->dev_state_path, "%d", XenbusStateConnected); + if (err) { + xenbus_dev_error(&info->dev, err, + "%s: writing dev_state_path", __func__); + return err; + } + } return 0; } @@ -665,10 +672,15 @@ static int scsifront_sdev_configure(struct scsi_device *sdev) static void scsifront_sdev_destroy(struct scsi_device *sdev) { struct vscsifrnt_info *info = shost_priv(sdev->host); + int err; - if (info && current == info->curr) - xenbus_printf(XBT_NIL, info->dev->nodename, + if (info && current == info->curr) { + err = xenbus_printf(XBT_NIL, info->dev->nodename, info->dev_state_path, "%d", XenbusStateClosed); + if (err) + xenbus_dev_error(&info->dev, err, + "%s: writing dev_state_path", __func__); + } } static struct scsi_host_template scsifront_sht = { @@ -1003,9 +1015,12 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op) if (scsi_add_device(info->host, chn, tgt, lun)) { dev_err(&dev->dev, "scsi_add_device\n"); - xenbus_printf(XBT_NIL, dev->nodename, + err = xenbus_printf(XBT_NIL, dev->nodename, info->dev_state_path, "%d", XenbusStateClosed); + if (err) + xenbus_dev_error(dev, err, + "%s: writing dev_state_path", __func__); } break; case VSCSIFRONT_OP_DEL_LUN: @@ -1019,10 +1034,14 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op) } break; case VSCSIFRONT_OP_READD_LUN: - if (device_state == XenbusStateConnected) - xenbus_printf(XBT_NIL, dev->nodename, + if (device_state == XenbusStateConnected) { + err = xenbus_printf(XBT_NIL, dev->nodename, info->dev_state_path, "%d", XenbusStateConnected); + if (err) + xenbus_dev_error(dev, err, + "%s: writing dev_state_path", __func__); + } break; default: break;
When xenbus_printf fails, the lack of error-handling code may cause unexpected results. This patch adds error-handling code after calling xenbus_printf. Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com> --- v1->v2: - Fix dereferencing before checking. v2->v3: - Use xenbus_dev_error to report errors. v3->v4: - Fix compilation errors. --- drivers/scsi/xen-scsifront.c | 33 ++++++++++++++++++++++++++------- 1 file changed, 26 insertions(+), 7 deletions(-)