summaryrefslogtreecommitdiff
path: root/drivers/scsi/scsi_sysfs.c
diff options
context:
space:
mode:
authorHannes Reinecke <hare@suse.de>2015-11-09 15:24:28 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2015-11-30 19:23:45 +0300
commit09e2b0b14690fb13ccfc04af49f156df3e25b152 (patch)
tree4643ba86b1896df0b6a119416f31db4d4da0851b /drivers/scsi/scsi_sysfs.c
parentfe0798c5e150be8f06959250076d3864477e74c2 (diff)
downloadlinux-09e2b0b14690fb13ccfc04af49f156df3e25b152.tar.xz
scsi: rescan VPD attributes
The VPD page information might change, so we need to be able to update it. This patch implements a VPD page rescan whenever the 'rescan' sysfs attribute is triggered. Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Shane Seymour <shane.seymour@hpe.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
-rw-r--r--drivers/scsi/scsi_sysfs.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 8d2312239ae0..158f1b553acf 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -760,11 +760,15 @@ show_vpd_##_page(struct file *filp, struct kobject *kobj, \
{ \
struct device *dev = container_of(kobj, struct device, kobj); \
struct scsi_device *sdev = to_scsi_device(dev); \
+ int ret; \
if (!sdev->vpd_##_page) \
return -EINVAL; \
- return memory_read_from_buffer(buf, count, &off, \
- sdev->vpd_##_page, \
+ rcu_read_lock(); \
+ ret = memory_read_from_buffer(buf, count, &off, \
+ rcu_dereference(sdev->vpd_##_page), \
sdev->vpd_##_page##_len); \
+ rcu_read_unlock(); \
+ return ret; \
} \
static struct bin_attribute dev_attr_vpd_##_page = { \
.attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \